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Results for "

thiol group

" in MedChemExpress (MCE) Product Catalog:

By Targets:	ADC Linker (7) ADC Payload (1) Amino Acid Derivatives (2) Apoptosis (1) Bacterial (5) Biochemical Assay Reagents (124) Carboxypeptidase (1) Cuproptosis (1) DNA Stain (1) Drug Derivative (1) Drug Intermediate (5) Drug-Linker Conjugates for ADC (1) EGFR (1) Endogenous Metabolite (8) Environmental Pollutants (2) Fluorescent Dye (34) Fungal (4) Glutathione S-transferase (1) HIV (2) Integrin (1) Ligands for E3 Ligase (1) Lipocalin Family (1) Liposome (10) Microtubule/Tubulin (1) NADPH Oxidase (1) NF-κB (1) NO Synthase (1) Parasite (2) PROTAC Linkers (7) Radionuclide-Drug Conjugates (RDCs) (1) Reactive Oxygen Species (ROS) (4) Reference Standards (4) SOD (1) STAT (1) Tyrosinase (2) ULK (1)
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Click Chemistry:	ADC Synthesis (3) TCO (5) DBCO (4) PROTAC Synthesis (3) Azide (4) Alkynes (4)
Oligonucleotides:	Pegylated Lipids (4) Phospholipids (5) Polymers (5)

215

Inhibitors & Agonists

Fluorescent Dye

Biochemical Assay Reagents

Peptides

Natural
Products

Click Chemistry

Oligonucleotides

Targets Recommended: HMG Family

Cat. No.	Product Name	Target	Research Areas	Chemical Structure

HY-15915

DTNB Maximum Cited Publications 14 Publications Verification Ellman’s Reagent	Biochemical Assay Reagents	Others
DTNB (Ellman’s Reagent) is a chemical used to quantify the number or concentration of thiol groups .

HY-138200

Cy5 maleimide 1 Publications Verification Cyanine5 maleimide	DNA Stain Fluorescent Dye	Others
Cy5 maleimide (Cyanine5 maleimide) is a single-reactive dye containing a maleimide group and a CY5 fluorescent group, which can selectively couple with a thiol group. Cy5 maleimide can be used to label antibodies, peptides, or proteins (Ex/Em = 646/664 nm).

HY-166648

DSPE-PEG2000-Maleimide sodium (purity>99%) 1 Publications Verification	Liposome	Cancer
DSPE-PEG2000-Maleimide sodium (purity>99%) is a functional lipid component and a thiol-reactive crosslinker. DSPE-PEG2000-Maleimide sodium (purity>99%) undergoes Michael addition with the thiol groups of thiolated or cyclic RGD peptides to form stable thioether bonds and DSPE-PEG2000-RGD. DSPE-PEG2000-Maleimide sodium (purity>99%) is applicable to research on drug delivery .

HY-136386

N-Acetyl-D-cysteine 3 Publications Verification	Reactive Oxygen Species (ROS)	Others
N-Acetyl-D-cysteine has antioxidant activities and scavenges ROS through the reaction with its thiol group, but cannot enter the glutathione metabolic pathway .

HY-D0042

NBD-Cl 1 Publications Verification NBD chloride	Fluorescent Dye	Others
NBD-Cl is a nonfluorescent reagent which becomes highly fluorescent after reaction with thiol or amino groups .

HY-W591476

m-PEG1000-thiol mPEG1000-SH	Biochemical Assay Reagents	Others
m-PEG1000-thiol is a surface modifier that can modify DNA thiolation and is used in the synthesis of gold nanorods (AuNR). m-PEG1000-thiol can load thiolated DNA onto AuNR, form a covalent bond with the surface of gold nanoparticles through the thiol group, and stabilize the nanoparticles by the steric hindrance effect of the polyethylene glycol chain, preventing aggregation and enhancing its biocompatibility. m-PEG1000-thiol can also provide a platform for the subsequent coupling of biomolecules (such as DNA, antibodies) by replacing surfactants (such as CTAB) on the surface of nanoparticles, thereby exerting its activity in promoting the functionalization of nanomaterials [2].

HY-159057

Biotin-BMCC	Biochemical Assay Reagents	Others
Biotin-BMCC is a Maliemide (HY-W007324) conjugated biotin molecule that has a high affinity for free thiol groups of cysteines .

HY-D1390A

Sulfo-Cy5-Mal	Fluorescent Dye	Others
Sulfo-Cy5-Mal is a fluorescent dye derivative composed of a CY5 dye and a maleimide functional group. Sulfo-Cy5-Mal specifically covalently binds to thiol-containing (-SH) biomolecules. Sulfo-Cy5-Mal can be used for protein labeling, antibody conjugation, molecular imaging, and drug delivery studies (Ex/Em = 633 nm/670 nm) .

HY-138525

Azido-PEG4-Thiol	PROTAC Linkers	Cancer
Azido-PEG4-Thiol is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs . Azido-PEG4-Thiol is a click chemistry reagent, it contains an Azide group and can undergo copper-catalyzed azide-alkyne cycloaddition reaction (CuAAc) with molecules containing Alkyne groups. It can also undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules containing DBCO or BCN groups.

HY-W998680

Fluorescein-maleimide 5-FITC-Maleimide	Fluorescent Dye	Others
Fluorescein-maleimide (5-FITC-Maleimide) is a thiol-reactive fluorescent derivatization reagent and non-specific protein labeling reagent. Fluorescein-maleimide covalently binds to protein thiol groups for protein labeling. Fluorescein-maleimide covalently binds to protein amino and imidazole groups under neutral pH conditions. Fluorescein-maleimide is used for fluorescent labeling of proteins, nucleic acids or other molecules containing one or more thiol groups (Ex/Em = 494/519 nm) .

HY-130080

DM3 Maytansinoid DM3	ADC Payload Microtubule/Tubulin	Cancer
DM3 (Maytansinoid DM3), a Maytansine (HY-13674) analog bearing disulfide or thiol groups, and is a tubulin inhibitor. DM3 a cytotoxic moiety of antibody-drug conjugates (ADCs) .

HY-137541

2-Nitro-5-thiocyanatobenzoic acid NTCB	Biochemical Assay Reagents	Others
2-Nitro-5-thiocyanatobenzoic acid (NTCB) is a highly reactive reagent that transfers its cyano group rapidly to a nucleophilic thiolate. 2-Nitro-5-thiocyanatobenzoic acid has been proposed as a reagent for converting thiol groups in proteins into their S-cyano derivatives .

HY-W013754

S-Hexylglutathione	Glutathione S-transferase	Others
S-Hexylglutathione is an S-substituted glutathione in which the hydrogen of the thiol has been replaced by a hexyl group. S-Hexylglutathione is also an competitive inhibitor against glutathione-S-transferase. S-Hexylglutathione can be used as an affinity chromatographic ligand for glutathione-S-transferase and glutathione peroxidase .

HY-166648A

DSPE-PEG-Maleimide ammonium (MW 2000) 1 Publications Verification	Liposome	Others
DSPE-PEG-Maleimide ammonium (MW 2000) is a functional lipid component and a thiol-reactive crosslinker. DSPE-PEG-Maleimide ammonium (MW 2000) undergoes Michael addition with the thiol groups of thiolated or cyclic RGD peptides to form stable thioether bonds and DSPE-PEG (2000)-RGD. DSPE-PEG-Maleimide ammonium (MW 2000) is applicable to research on drug delivery .

HY-W441004

DSPE-Thiol	Liposome	Others
DSPE-Thiol is a phophalipid capped with thiol group. The thiol capped head can selectively react with maleimide. DSPE-Thiol can also be used for the preparation of phospholipid dimers .

HY-156377

Biotin-PEG7-Maleimide	Drug-Linker Conjugates for ADC	Cancer
Biotin-PEG7-Maleimide is a biotinylation reagent that reacts with thiol groups (SH). Biotin-PEG7-Maleimide can be used as Drug-Linker Conjugates for ADCs .

HY-W1048555A

Mal-PEG2000-SCM	Biochemical Assay Reagents	Others
Mal-PEG2000-SCM is a heterobifunctional PEG crosslinker bearing maleimide and succinimidyl carboxymethyl ester functional groups. MMal-PEG2000-SCM conjugates the F3 peptide to nanoparticles: the SCM group reacts with amino groups on the nanoparticle surface to form amide groups, while the MAL group reacts with thiol groups of the F3 peptide to form carbon-sulfur bonds. Mal-PEG-SCM enables unidirectional addition of linkers, ensuring that appropriate functional groups are available for RGD incorporation. Mal-PEG2000-SCM can be used in the development of nanoparticles targeting specific tumor cells .

HY-W014316

5-Bromo-5-nitro-1,3-dioxane	Bacterial Fungal	Infection
5-Bromo-5-nitro-1,3-dioxane is a broad-spectrum antimicrobial agent active against Gram-positive bacteria, Gram-negative bacteria and fungi. 5-Bromo-5-nitro-1,3-dioxane oxidizes free thiol groups to their corresponding disulfides. 5-Bromo-5-nitro-1,3-dioxane induces intracellular substance leakage in Escherichia coli and Staphylococcus aureus. 5-Bromo-5-nitro-1,3-dioxane modulates the oxygen consumption of Escherichia coli and Staphylococcus aureus .

HY-N9279

Dehydromonocrotaline Monocrotaline pyrrole; MCTP; 3,8-Didehydromonocrotaline	Endogenous Metabolite	Cardiovascular Disease Cancer
Dehydromonocrotaline is a mitochondrial respiratory chain complex I NADH oxidase inhibitor, with a IC₅₀ of 62.06 μM and a K_i of 8.1 μM in rats. Dehydromonocrotaline exerts non-competitive inhibitory effects by modifying cysteine thiol groups on complex I, and does not bind to the NADH-binding site. Dehydromonocrotaline dissipates mitochondrial membrane potential and reduces ATP levels. Dehydromonocrotaline can be used in studies related to hepatotoxicity, pulmonary hypertension and liver tumors .

HY-W1048549A

HOOC-PEG2000-SH HOOC-PEG2000-thiol	Biochemical Assay Reagents	Others
HOOC-PEG2000-SH (HOOC-PEG2000-Thiol) is a reactive thiol PEG derivative with a terminal carboxyl group. The carboxyl group can react with amine or hydroxyl groups to form a stable amide bond or an unstable ester bond. The PEG linkage between the thiol and carboxyl groups has good water solubility, flexible linker distance and higher stability .

HY-W1048849A

4-Arm PEG5000-SH 4-Arm PEG5000-thiol	Biochemical Assay Reagents	Others
4-Arm PEG5000-SH (4-Arm PEG5000-thiol) is a multi-arm PEG derivative with thiol groups at each end of the four arms. The reactive free thiol, SH or sulfhydryl groups react selectively with maleimide and transition metal surfaces including gold and silver .

HY-W1048849B

4-Arm PEG-SH (MW 10000) 4-Arm PEG-thiol (MW 10000)	Biochemical Assay Reagents	Others
4-Arm PEG-SH (MW 10000) (4-Arm PEG-thiol (MW 10000)) is a multi-arm PEG derivative with thiol groups at each end of the four arms. The reactive free thiol, SH or sulfhydryl groups react selectively with maleimide and transition metal surfaces including gold and silver .

HY-D1364

Pyrene maleimide	Biochemical Assay Reagents	Others
Pyrene maleimide is a polyaromatic fluorescent hydrocarbon with a termininal maleimide group. The maleimide group will react with a thiol group to form a covalent bond.

HY-D2498

Cy7 maleimide	Fluorescent Dye	Others
Cy7 maleimide is a fluorescent dye containing a Maleimide (HY-W007324) functional group. Maleimide can be used to label thiol groups on antibodies, proteins and peptides .

HY-116427

Propargyl-PEG4-thiol	ADC Linker PROTAC Linkers	Cancer
Propargyl-PEG4-thiol is a PEG-based PROTAC linker can be used in the synthesis of PROTACs. Propargyl-PEG4-thiol is a non-cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs) . Propargyl-PEG4-thiol is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.

HY-W1048849C

4-Arm PEG20000-SH 4-Arm PEG20000-thiol	Biochemical Assay Reagents	Others
4-Arm PEG20000-SH (4-Arm PEG20000-thiol) is a multi-arm PEG derivative with thiol groups at each end of the four arms. The reactive free thiol, SH or sulfhydryl groups react selectively with maleimide and transition metal surfaces including gold and silver .

HY-W190877

Thiol-PEG1-acid SH-PEG1-COOH	Biochemical Assay Reagents	Others
Thiol-PEG1-acid (SH-PEG1-COOH) is a PEG derivative consisting of a thiol (-SH), 1 PEG unit, and a carboxyl (-COOH). The thiol is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds. The carboxyl group can easily form stable amide bonds with amino groups, and can also form ester bonds with hydroxyl groups.

HY-W020780D

mPEG40000-Mal	Biochemical Assay Reagents	Others
mPEG40000-Mal is a thiol-reactive PEG derivative that can be used to selectively modify proteins, peptides, or any other surface with available thiol groups .

HY-W736950A

H-L-Cys(MDNPE)-OH hydrochloride	Amino Acid Derivatives	Others
H-L-Cys(MDNPE)-OH hydrochloride is a cysteine derivative with a short peptide sequence attached to the thiol group of cysteine.

HY-135133

S-Phenylsulfonylcysteine	Biochemical Assay Reagents	Others
S-Phenylsulfonylcysteine is a reagent for blocking thiol (-SH) groups on proteins and peptides .

HY-134428

Arachidonoyl coenzyme A lithium	Endogenous Metabolite	Metabolic Disease
Arachidonoyl coenzyme A lithium is an unsaturated fatty acyl coenzyme A, formed by the condensation of the thiol group of coenzyme A with the carboxyl group of arachidonic acid .

HY-W1048527

8-Arm PEG5000-SH 8-Arm PEG5000-thiol	Biochemical Assay Reagents	Others
8-Arm PEG5000-SH (8-Arm PEG5000-Thiol) is a multi-arm PEG derivative with thiol groups at each end of the eight arms. 8-Arm PEG5000-SH can be used for drug delivery .

HY-D2488

Sulfo Cy5.5-maleimide	Fluorescent Dye	Others
Sulfo Cy5.5-maleimide is a fluorescent dye containing a Maleimide (HY-W007324) functional group. Maleimide can be used to label thiol groups on antibodies, proteins and peptides.

HY-E70264

16:0 Coenzyme A triammonium	Endogenous Metabolite	Metabolic Disease
16:0 Coenzyme A triammonium is palmitoyl-CoA, which can serve as a reaction substrate to transfer the palmitoyl group to the free thiol group of the target protein through palmitoylation catalyzed by protein acyl transferases (PATs) .

HY-W1048549C

HOOC-PEG5000-SH HOOC-PEG5000-thiol	Biochemical Assay Reagents	Others
HOOC-PEG5000-SH (HOOC-PEG5000-Thiol) is a reactive thiol PEG derivative with a terminal carboxyl group. The carboxyl group can react with amine or hydroxyl groups to form a stable amide bond or an unstable ester bond. The PEG linkage between the thiol and carboxyl groups has good water solubility, flexible linker distance and higher stability .

HY-W1048849D

4-Arm PEG40000-SH 4-Arm PEG40000-thiol	Biochemical Assay Reagents	Others
4-Arm PEG40000-SH (4-Arm PEG40000-thiol) is a multi-arm PEG derivative with thiol groups at each end of the four arms. The reactive free thiol, SH or sulfhydryl groups react selectively with maleimide and transition metal surfaces including gold and silver .

HY-W1048527A

8-Arm PEG20000-SH 8-Arm PEG20000-thiol	Biochemical Assay Reagents	Others
8-Arm PEG20000-SH (8-Arm PEG20000-Thiol) is a multi-arm PEG derivative with thiol groups at each end of the eight arms. 8-Arm PEG20000-SH can be used for drug delivery .

HY-W1048527C

8-Arm PEG10000-SH 8-Arm PEG10000-thiol	Biochemical Assay Reagents	Others
8-Arm PEG10000-SH (8-Arm PEG10000-Thiol) is a multi-arm PEG derivative with thiol groups at each end of the eight arms. 8-Arm PEG10000-SH can be used for drug delivery .

HY-W591479

MC-Val-Ala-NHS ester	ADC Linker	Cancer
MC-Val-Ala-NHS ester is a cleavable ADC linker with a malimide group and an NHS ester group. The Val-Ala linkers can be cleaved by Cathepsin B. Maleimide group is reactive toward thiol groups. MC is reactive with thiol moieties. The NHS ester is able to react specifically and efficiently with amines (e.g. the side chain of lysine residues or aminosilane-coated surfaces) at neutral or slightly basic condition to form a covalent bond.

HY-W590555

Thiol-PEG2000-DMG	Liposome	Cancer
Thiol-PEG2000-DMG is a phospholipid polyPEG which can be used to prepare liposomes or nanoparticles. The terminal thiol group reacts with maleimide, OPSS, vinylsulfone and transition metal surfaces including gold, silver, etc.

HY-174965H

DBCO-PEG10000-SH DBCO-PEG10000-thiol	Biochemical Assay Reagents	Others
DBCO-PEG10000-SH (DBCO-PEG10000-Thiol) is a DBCO-modified PEG derivative. DBCO-PEG10000-SH contains a DBCO group and can undergo a strain-promoted alkyne-azide cycloaddition reaction (SPAAC) with molecules containing an azide group .

HY-174965D

DBCO-PEG3400-SH DBCO-PEG3400-thiol	Biochemical Assay Reagents	Others
DBCO-PEG3400-SH (DBCO-PEG3400-Thiol) is a DBCO-modified PEG derivative. DBCO-PEG3400-SH contains a DBCO group and can undergo a strain-promoted alkyne-azide cycloaddition reaction (SPAAC) with molecules containing an azide group .

HY-174965B

DBCO-PEG1000-SH DBCO-PEG1000-thiol	Biochemical Assay Reagents	Others
DBCO-PEG1000-SH (DBCO-PEG1000-Thiol) is a DBCO-modified PEG derivative. DBCO-PEG1000-SH contains a DBCO group and can undergo a strain-promoted alkyne-azide cycloaddition reaction (SPAAC) with molecules containing an azide group .

HY-W800787

18:1 PE MCC	Liposome	Cancer
18:1 PE MCC is a maleimide-functionalized thiol-reactive lipid with a phosphoethanolamine linked to two oleic acid tails and a maleimide group.

HY-118112

4-N-Maleimidobenzoicacid-NHS	Biochemical Assay Reagents	Others
4-N-Maleimidobenzoicacid-NHS is a PEG linker that finds utility in bioconjugation endeavors and protein labeling ventures. Specifically designed for selective reaction with thiol groups, the maleimide group establishes covalent linkages, thereby facilitating the coupling of proteins, peptides, or diverse molecules to thiol-bearing biomolecules. The NHS ester is able to react specifically and efficiently with primary amines (e.g. the side chain of lysine residues or aminosilane-coated surfaces) at neutral or slightly basic conditions to form a covalent bond.

HY-CE00380

(S)-3-Hydroxyoctanoyl-CoA (S)-3-Hydroxyoctanoyl-Coenzyme A	Biochemical Assay Reagents	Metabolic Disease
(S)-3-Hydroxyoctanoyl-CoA ((S)-3-Hydroxyoctanoyl-Coenzyme A) is a hydroxy fatty acyl-CoA that results from the formal condensation of the thiol group of coenzyme A with the carboxy group of (S)-3-hydroxyoctanoic acid.

HY-D1526

N-(4-Anilino-1-naphthyl)maleimide	Fluorescent Dye	Others
N-(4-Anilino-1-naphthyl)maleimide is a fluorescent probe that can be used to detect thiol groups in proteins. N-(4-Anilino-1-naphthyl)maleimide reacts with thiol groups and immediately produces a stable fluorescent compound with the λ_ex=355 nm, λ_em=448 nm .

HY-D0151

Tetramethylrhodamine-5-maleimide	Fluorescent Dye	Others
Tetramethylrhodamine-5-maleimide is a fluorescent probe with high specificity for cysteine thiol (SH) groups. Tetramethylrhodamine-5-maleimide has high sensitivity, responds rapidly to negatively charged nanoparticles, and shows a concentration-dependent decrease in fluorescence intensity, but it is susceptible to interference from humic acids .

HY-W1048549E

HOOC-PEG20000-SH HOOC-PEG20000-thiol	Biochemical Assay Reagents	Others
HOOC-PEG20000-SH (HOOC-PEG20000-Thiol) is a reactive thiol PEG derivative with a terminal carboxyl group. The carboxyl group can react with amine or hydroxyl groups to form a stable amide bond or an unstable ester bond. The PEG linkage between the thiol and carboxyl groups has good water solubility, flexible linker distance and higher stability .

HY-174949B

FMOC-NH-PEG3400-SH FMOC-NH-PEG3400-thiol	Biochemical Assay Reagents	Others
FMOC-NH-PEG3400-SH (FMOC-NH-PEG3400-Thiol) is a PEG derivative with an Fmoc protecting group and a thiol (-SH) reactive group. The thiol group is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds. Fmoc is a commonly used amino protecting group that protects the amino group from unwanted reactions until it is removed when a specific coupling reaction is required.

Cat. No.	Product Name	Type

HY-138200

Cy5 maleimide 1 Publications Verification Cyanine5 maleimide	Fluorescent Dye
Cy5 maleimide (Cyanine5 maleimide) is a single-reactive dye containing a maleimide group and a CY5 fluorescent group, which can selectively couple with a thiol group. Cy5 maleimide can be used to label antibodies, peptides, or proteins (Ex/Em = 646/664 nm).

HY-D0042

NBD-Cl 1 Publications Verification NBD chloride	Fluorescent Dye
NBD-Cl is a nonfluorescent reagent which becomes highly fluorescent after reaction with thiol or amino groups .

HY-15941

5(6)-FITC

2 Publications Verification

Fluorescein 5(6)-isothiocyanate; Fluorescein isothiocyanate 5- and 6- isomers

Fluorescent Dye

5(6)-FITC (Fluorescein 5(6)-isothiocyanate) is an amine-reactive derivative of a fluorescent dye, characterized by high absorbance and excellent fluorescence quantum yield. The isothiocyanate group of FITC can react with various functional groups on proteins, including amines, thiols, imidazoles, tyrosines and carbonyls, enabling the labeling of proteins such as antibodies and lectins. 5(6)-FITC has a wide range of applications, including flow cytometry, immunofluorescence, protease assays and conjugation. The maximum excitation/emission wavelengths are 492/518 nm .

HY-D2906

Alexa fluor 647 maleimide

Fluorescent Dye

Alexa fluor 647 maleimide is a bright, far-red-emitting fluorescent dye for labeling of protein SH groups (Ex/Em = 656/670 nm). Alexa fluor 647 maleimide can be used to attach AF 647 fluorophore to proteins and peptides containing cysteine residues, as well as to other thiolated molecules (such as thiol-containing oligonucleotides). Alexa Fluor 647 maleimide is promising for research of cell biology, neuroscience, and disease diagnostics .

HY-D1390A

Sulfo-Cy5-Mal	Fluorescent Dye
Sulfo-Cy5-Mal is a fluorescent dye derivative composed of a CY5 dye and a maleimide functional group. Sulfo-Cy5-Mal specifically covalently binds to thiol-containing (-SH) biomolecules. Sulfo-Cy5-Mal can be used for protein labeling, antibody conjugation, molecular imaging, and drug delivery studies (Ex/Em = 633 nm/670 nm) .

HY-W998680

Fluorescein-maleimide

5-FITC-Maleimide

Fluorescent Dye

Fluorescein-maleimide (5-FITC-Maleimide) is a thiol-reactive fluorescent derivatization reagent and non-specific protein labeling reagent. Fluorescein-maleimide covalently binds to protein thiol groups for protein labeling. Fluorescein-maleimide covalently binds to protein amino and imidazole groups under neutral pH conditions. Fluorescein-maleimide is used for fluorescent labeling of proteins, nucleic acids or other molecules containing one or more thiol groups (Ex/Em = 494/519 nm) .

HY-D2381

AF 488 maleimide	Fluorescent Dye
AF 488 maleimide is a thiol-reactive dye used to label SH groups of proteins, which can attach the AF 488 fluorophore to cysteine residue-containing proteins and peptides as well as other thiolated molecules. AF 488 maleimide enables real-time visualization of dynamic pilus extension and retraction in live bacterial cells via epifluorescence microscopy (Ex/Em = 470/520 nm) .

HY-D1871

Cy3 maleimide chloride

Fluorescent Dye

Cy3 maleimide chloride is a dye derivative of Cyanine 3 (Cy3) (HY-D0822) containing maleimide functional groups. Cy3 is a fluorescent dye with a fluorescence spectrum typically in the green to orange wavelength range. The alkyne functional group of Cy3 maleimide chloride can undergo a "thiol-acrylamide" reaction with molecules containing sulfur-oxygen functional groups to form covalent bonds. Cy3 maleimide chloride can bind to biological molecules such as proteins and antibodies to track their location and dynamic changes in biological samples.

HY-D2498

Cy7 maleimide	Fluorescent Dye
Cy7 maleimide is a fluorescent dye containing a Maleimide (HY-W007324) functional group. Maleimide can be used to label thiol groups on antibodies, proteins and peptides .

HY-W190932

TAMRA-PEG2-Maleimide	Fluorescent Dye
TAMRA-PEG2-Maleimide is a dye derivative of TAMRA (HY-135640) containing 4 PEG units. TAMRA-PEG2-Maleimide contains a maleimide group that can react with a thiol group to form a covalent bond.

HY-D2448

Cy3-PEG-Thiol	Fluorescent Dye
Cy3-PEG-Thiol (Cy3-PEG-SH) is a near infrared fluorescent labeling reagent that combines Cy3 fluorescent dye, polyethylene glycol (PEG) and sulfhydryl (SH) polyethylene glycol derivatives, and is suitable for molecular coupling. Cy3-PEG-Thiol is absorbed at 550nm and has high solubility and end-group substitution rate .

HY-D1260

FM-red PSH-red	Fluorescent Dye
FM-red (PSH-red) is a red-emitting and environment-sensitive probe for selectively detecting and labeling protein thiols. FM-red can be used to image protein sulfhydryl groups in live cells and in vivo. FM-red also could be used to measure of the redox states of thioredoxin (Trx) .

HY-D2488

Sulfo Cy5.5-maleimide	Fluorescent Dye
Sulfo Cy5.5-maleimide is a fluorescent dye containing a Maleimide (HY-W007324) functional group. Maleimide can be used to label thiol groups on antibodies, proteins and peptides.

HY-D2497

Sulfo Cy7 bis-SH	Fluorescent Dye
Sulfo Cy7 bis-SH is a fluorescent dye that contains sulfonated Cyanine7 (Sulfo-CY7) fluorescent dye and thiol (-SH) functional group. SH is highly reactive and can react with a variety of functional groups (such as maleimide) to form stable thioether bonds .

HY-172721

Cy3B maleimide

Fluorescent Dye

Cy3B maleimide is a mono-reactive dye containing maleimide group, which can selectively and efficiently attach Cyanine3 fluorophore (an analog of Cy3) to proteins and peptides containing cysteine residues, as well as to other thiolated molecules (such as thiol-containing oligonucleotides). Cy3B is an improved version of Cy3 dyes with significantly increased fluorescence quantum yield and photostability.

HY-D1390

Sulfo-Cy5-Mal potassium	Fluorescent Dye
Sulfo-Cy5-Mal potassium is a fluorescent dye derivative composed of a CY5 dye and a maleimide functional group. Sulfo-Cy5-Mal potassium specifically covalently binds to thiol-containing (-SH) biomolecules. Sulfo-Cy5-Mal potassium can be used for protein labeling, antibody conjugation, molecular imaging, and drug delivery studies (Ex/Em = 633 nm/670 nm) .

HY-D2510

Cy3-PEG2000-SH	Fluorescent Dye
Cy3-PEG2000-SH (Cy3-PEG-Thiol) is a near infrared fluorescent labeling reagent that combines Cy3 fluorescent dye, polyethylene glycol (PEG) and sulfhydryl (SH) polyethylene glycol derivatives, and is suitable for molecular coupling. Cy3-PEG2000-SH is absorbed at 550nm and has high solubility and end-group substitution rate .

HY-D1526

N-(4-Anilino-1-naphthyl)maleimide	Fluorescent Dye
N-(4-Anilino-1-naphthyl)maleimide is a fluorescent probe that can be used to detect thiol groups in proteins. N-(4-Anilino-1-naphthyl)maleimide reacts with thiol groups and immediately produces a stable fluorescent compound with the λ_ex=355 nm, λ_em=448 nm .

HY-D0151

Tetramethylrhodamine-5-maleimide	Fluorescent Dye
Tetramethylrhodamine-5-maleimide is a fluorescent probe with high specificity for cysteine thiol (SH) groups. Tetramethylrhodamine-5-maleimide has high sensitivity, responds rapidly to negatively charged nanoparticles, and shows a concentration-dependent decrease in fluorescence intensity, but it is susceptible to interference from humic acids .

HY-D2091

PE-VF647 Maleimide	Fluorescent Dye
PE-VF647 Maleimide is a double-dye dye that can undergo thiol reaction. It contains maleimide groups that can react with thiol groups to form covalent bonds. PE-VF647 Maleimide contains two dyes, PE and VF, with excitation wavelengths (Ex) of 495 nm and 566 nm, respectively. PE-VF594 Maleimide has an emission wavelength (Em) of 665 nm.

HY-D2093

PE-VF750 Maleimide	Fluorescent Dye
PE-VF750 Maleimide is a thiol-reactive double-dye dye that contains maleimide groups that can react with thiol groups to form covalent bonds. Ex/Em=495-566/777 nm. PE-VF750 Maleimide contains two dyes, PE and VF, with excitation wavelengths (Ex) of 495 nm and 566 nm, respectively. PE-VF594 Maleimide has an emission wavelength (Em) of 777 nm.

HY-D2092

PE-VF680 Maleimide	Fluorescent Dye
PE-VF680 Maleimide is a double-dye dye that can undergo thiol reaction. It contains maleimide groups that can react with thiol groups to form covalent bonds. Ex/Em=495-566/701 nm. PE-VF680 Maleimide contains two dyes, PE and VF, with excitation wavelengths (Ex) of 495 nm and 566 nm, respectively. PE-VF594 Maleimide has an emission wavelength (Em) of 701 nm.

HY-D2103

TAMRA-PEG3-Maleimide	Fluorescent Dye
TAMRA-PEG3-Maleimide is a dye derivative of TAMRA (HY-135640) containing 3 PEG units. TAMRA-PEG3-Maleimide contains maleimide groups that react with thiol groups to form covalent bonds.

HY-D2104

TAMRA-PEG7-Maleimide	Fluorescent Dye
TAMRA-PEG7-Maleimide is a dye derivative of TAMRA (HY-135640) containing 7 PEG units. TAMRA-PEG7-Maleimide contains a maleimide group that can react with a thiol group to form a covalent bond.

HY-D2150

AF 430 maleimide	Fluorescent Dye
AF 430 maleimide is a derivative of the yellow fluorescent dye AF 430. AF430 has an excitation wavelength of 425 nm and an emission wavelength of 542 nm. AF 430 maleimide contains maleimide groups that react with thiol groups to form covalent bonds. To achieve specific coupling of dye labels and biomolecules .

HY-D2094

PerCP Maleimide	Fluorescent Dye
PerCP Maleimide is a fluorescent dye that reacts with free sulfhydryl groups on proteins. PerCP is a red fluorescence albuminous dye for immunostaining and Maleimide can be leveraged for the preparation of fluorogenic probe, which is mainly used for the specific detection of thiol analytes .

HY-D1404

5MP-Propargyl

Fluorescent Dye

5MP-Propargyl is the derivative of 5-Methylene pyrrolone (5MP). 5-Methylene pyrrolones (5MPs) are thiol-specific, reversible bioconjugation reagents for cysteine-specific protein modification, that are commonly used for protein bioconjugation . 5MP-Propargyl is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.

HY-D1407

Br-5MP-Propargyl

Fluorescent Dye

Br-5MP-Propargyl is the derivative of 5-Methylene pyrrolone (5MP). 5-Methylene pyrrolones (5MPs) are thiol-specific, reversible bioconjugation reagents for cysteine-specific protein modification, that are commonly used for protein bioconjugation . Br-5MP-Propargyl is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.

HY-D2513

Cy3-PEG10000-SH	Fluorescent Dye
Cy3-PEG10000-SH (Cy3-PEG-Thiol) is a near infrared fluorescent labeling reagent that combines Cy3 fluorescent dye, polyethylene glycol (PEG) and sulfhydryl (SH) polyethylene glycol derivatives, and is suitable for molecular coupling. Cy3-PEG10000-SH is absorbed at 550nm and has high solubility and end-group substitution rate .

HY-D2511

Cy3-PEG3400-SH	Fluorescent Dye
Cy3-PEG3400-SH (Cy3-PEG-Thiol) is a near infrared fluorescent labeling reagent that combines Cy3 fluorescent dye, polyethylene glycol (PEG) and sulfhydryl (SH) polyethylene glycol derivatives, and is suitable for molecular coupling. Cy3-PEG3400-SH is absorbed at 550nm and has high solubility and end-group substitution rate .

HY-D3200

Dns–LLC

Fluorescent Dye

Dns-LLC is a cell-permeable Cu ⁺-selective fluorescent probe that forms a 1:1 complex with Cu ⁺. The thiol group of Dns-LLC plays a key binding role, while the sulfonamide and amide groups jointly contribute to the stabilization of the complex. Upon binding to Cu ⁺ in aqueous buffer solutions, Dns-LLC generates a turn-on fluorescence response, which can be used for the detection of Cu ⁺ in the Golgi apparatus .

HY-D2763

BP Fluor 532 maleimide

Fluorescent Dye

BP Fluor 532 maleimide is a photostable, bright yellow-fluorescent dye with pH insensitive emission from pH 4 to pH 10. The excitation of BP Fluor 532 is ideally suited for the frequency-doubled Nd:YAG laser line. BP Fluor 532 dye can be conjugated to a variety of antibodies, peptides, proteins, tracers, and amplification substrates, and is often used for the generation of stable signals in imaging and flow cytometry. Maleimide is the most popular sulfhydryl-reactive group for conjugating the dye to a thiol group on a protein, oligonucleotide thiophosphate, or low molecular weight ligand. The maleimide group specifically and efficiently reacts with reduced thiols (sulfhydryl groups, –SH) at pH 6.5 to 7.5 to form a stable thioether bond. The resulting conjugates exhibit brighter fluorescence and greater photostability than the conjugates of many other spectrally similar fluorophores.

HY-D3052

5(6)-carbonylated rhodamine 110 maleimide	Fluorescent Dye
5(6)-carbonylated rhodamine 110 maleimide is a maleimide-based fluorescent reagent based on 5(6)-carbonylated rhodamine 110. Maleimide can be labeled by forming a stable thioester structure through an affinity addition reaction with a thiol group (-SH) (Ex/Em = 502/527 nm).

HY-D3056

5(6)-Rhodamine 6G maleimide	Fluorescent Dye
5(6)-Rhodamine 6G maleimide is a maleimide-based fluorescent reagent based on Rhodamine 6G (HY-D0309). Maleimide can be labeled by forming a stable thioester structure through an affinity addition reaction with a thiol group (-SH) (Ex/Em = 526/547 nm).

Cat. No.	Product Name	Type

HY-15915

DTNB Maximum Cited Publications 14 Publications Verification Ellman’s Reagent	Biochemical Assay Reagents
DTNB (Ellman’s Reagent) is a chemical used to quantify the number or concentration of thiol groups .

HY-NP008

β-Lactoglobulin

Biochemical Assay Reagents

β-Lactoglobulin, a major whey protein, is a small globular protein from the lipocalin family. β-Lactoglobulin is an important source of the essential and branched-chain amino acids (leucine, isoleucine, and valine). β-Lactoglobulin shows antioxidant properties, because it contains two disulfide bonds and one free thiol group. β-Lactoglobulin is a ligand transport agent. β-Lactoglobulin is one of the major allergens in milk and can be utilized in the research for developing safe hypoallergenic dairy products .

HY-166648

DSPE-PEG2000-Maleimide sodium (purity>99%) 1 Publications Verification	Biochemical Assay Reagents
DSPE-PEG2000-Maleimide sodium (purity>99%) is a functional lipid component and a thiol-reactive crosslinker. DSPE-PEG2000-Maleimide sodium (purity>99%) undergoes Michael addition with the thiol groups of thiolated or cyclic RGD peptides to form stable thioether bonds and DSPE-PEG2000-RGD. DSPE-PEG2000-Maleimide sodium (purity>99%) is applicable to research on drug delivery .

HY-W068119A

N-(2-Aminoethyl)maleimide hydrochloride

2-Maleimidoethylamine hydrochloride

Biochemical Assay Reagents

N-(2-Aminoethyl)maleimide (2-Maleimidoethylamine) hydrochloride is a selective covalent binding agent for thiol groups (RSGs), covalently binding to thiols via an irreversible thioether bond to prepare MMP-2-sensitive nanosystems. Under near-neutral conditions, the maleimide group in N-(2-Aminoethyl)maleimide hydrochloride binds to thiol groups via a nucleophilic addition reaction, and can be used to modify polymers or biological interfaces, enhancing mucosal adhesion and regulating the surface charge of biological interfaces. N-(2-Aminoethyl)maleimide hydrochloride can optimize the adhesion performance of drug delivery carriers and cell interactions with biological interfaces, and is applied in transmucosal drug delivery systems (such as drug carriers for oral and bladder sites) and biomaterial surface engineering research, providing support for tissue implantation, regeneration, and related drug delivery .

HY-W440896

DSPE-PEG2000-SH

Biochemical Assay Reagents

DSPE-PEG2000-SH is an amphiphilic thiol-functionalized DSPE-PEG molecule. DSPE-PEG2000-SH inserts into extracellular vesicle (EV) bilayer membranes via hydrophobic interactions, displaying surface thiol groups to form EV-SH crosslinkers.DSPE-PEG2000-SH enables crosslinking of EV-SH with 8-arm PEG-norbornene via thiol-ene photochemistry to construct hydrogels, with hydrogel mechanical properties tunable via PEG segment molecular weight variation.DSPE-PEG2000-SH can be used to encapsulate agents for drug delivery system, such as mRNA vaccine .

HY-W591476

m-PEG1000-thiol

mPEG1000-SH

Biochemical Assay Reagents

m-PEG1000-thiol is a surface modifier that can modify DNA thiolation and is used in the synthesis of gold nanorods (AuNR). m-PEG1000-thiol can load thiolated DNA onto AuNR, form a covalent bond with the surface of gold nanoparticles through the thiol group, and stabilize the nanoparticles by the steric hindrance effect of the polyethylene glycol chain, preventing aggregation and enhancing its biocompatibility. m-PEG1000-thiol can also provide a platform for the subsequent coupling of biomolecules (such as DNA, antibodies) by replacing surfactants (such as CTAB) on the surface of nanoparticles, thereby exerting its activity in promoting the functionalization of nanomaterials [2].

HY-Y0102

Thiosalicylic acid 2-Mercaptobenzoic acid	Biochemical Assay Reagents
Thiosalicylic acid (2-Mercaptobenzoic acid) is an organosulfur compound bearing both sulfhydryl and carboxyl functional groups. Thiosalicylic acid acts as a desulfurizing agent. Thiosalicylic acid also serves as a ligand to synthesize azosulfonamide derivatives with antibacterial and antifungal activities, as well as their Fe ³⁺, Cu ²⁺ and Hg ²⁺ chelates .

HY-168940B

NH2-PEG2000-COOH

Biochemical Assay Reagents

NH2-PEG2000-COOH is a heterofunctional polyethylene glycol with one amino terminal group and one carboxyl terminal group. NH2-PEG2000-COOH reacts with N-succinimidyl-6-maleimidohexanoate to introduce a maleimide terminal group, followed by conjugation with thiolated RGD peptide via a thiol-maleimide coupling reaction to synthesize RGD-PEG-COOH. NH2-PEG2000-COOH can be used in cancer research .

HY-W441004

DSPE-Thiol	Biochemical Assay Reagents
DSPE-Thiol is a phophalipid capped with thiol group. The thiol capped head can selectively react with maleimide. DSPE-Thiol can also be used for the preparation of phospholipid dimers .

HY-W1048555A

Mal-PEG2000-SCM

Biochemical Assay Reagents

Mal-PEG2000-SCM is a heterobifunctional PEG crosslinker bearing maleimide and succinimidyl carboxymethyl ester functional groups. MMal-PEG2000-SCM conjugates the F3 peptide to nanoparticles: the SCM group reacts with amino groups on the nanoparticle surface to form amide groups, while the MAL group reacts with thiol groups of the F3 peptide to form carbon-sulfur bonds. Mal-PEG-SCM enables unidirectional addition of linkers, ensuring that appropriate functional groups are available for RGD incorporation. Mal-PEG2000-SCM can be used in the development of nanoparticles targeting specific tumor cells .

HY-W1048549A

HOOC-PEG2000-SH HOOC-PEG2000-thiol	Biochemical Assay Reagents
HOOC-PEG2000-SH (HOOC-PEG2000-Thiol) is a reactive thiol PEG derivative with a terminal carboxyl group. The carboxyl group can react with amine or hydroxyl groups to form a stable amide bond or an unstable ester bond. The PEG linkage between the thiol and carboxyl groups has good water solubility, flexible linker distance and higher stability .

HY-W1048849A

4-Arm PEG5000-SH 4-Arm PEG5000-thiol	Biochemical Assay Reagents
4-Arm PEG5000-SH (4-Arm PEG5000-thiol) is a multi-arm PEG derivative with thiol groups at each end of the four arms. The reactive free thiol, SH or sulfhydryl groups react selectively with maleimide and transition metal surfaces including gold and silver .

HY-W1048849B

4-Arm PEG-SH (MW 10000) 4-Arm PEG-thiol (MW 10000)	Biochemical Assay Reagents
4-Arm PEG-SH (MW 10000) (4-Arm PEG-thiol (MW 10000)) is a multi-arm PEG derivative with thiol groups at each end of the four arms. The reactive free thiol, SH or sulfhydryl groups react selectively with maleimide and transition metal surfaces including gold and silver .

HY-D1364

Pyrene maleimide	Biochemical Assay Reagents
Pyrene maleimide is a polyaromatic fluorescent hydrocarbon with a termininal maleimide group. The maleimide group will react with a thiol group to form a covalent bond.

HY-W1048849C

4-Arm PEG20000-SH 4-Arm PEG20000-thiol	Biochemical Assay Reagents
4-Arm PEG20000-SH (4-Arm PEG20000-thiol) is a multi-arm PEG derivative with thiol groups at each end of the four arms. The reactive free thiol, SH or sulfhydryl groups react selectively with maleimide and transition metal surfaces including gold and silver .

HY-W190877

Thiol-PEG1-acid SH-PEG1-COOH	Biochemical Assay Reagents
Thiol-PEG1-acid (SH-PEG1-COOH) is a PEG derivative consisting of a thiol (-SH), 1 PEG unit, and a carboxyl (-COOH). The thiol is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds. The carboxyl group can easily form stable amide bonds with amino groups, and can also form ester bonds with hydroxyl groups.

HY-W020780D

mPEG40000-Mal	Biochemical Assay Reagents
mPEG40000-Mal is a thiol-reactive PEG derivative that can be used to selectively modify proteins, peptides, or any other surface with available thiol groups .

HY-W1048553A

Mal-PEG2000-NH2 TFA	Biochemical Assay Reagents
Mal-PEG2000-NH2TFA is a linear heterobifunctional PEG product with maleimide and NH2 groups. The maleimide can react with thiols, SH, sulfhydryls or sulfhydryls, and the amine can react with carboxylic acids or activated NHS esters .

HY-W1048851B

4-Arm-PEG10000-Maleimide 4-Arm-PEG10000-Mal	Biochemical Assay Reagents
4-Arm-PEG10000-Maleimide (4-Arm-PEG10000-Mal) is a four-arm star-shaped multifunctional PEG crosslinker with an average molecular weight of 10 kDa and maleimide terminal groups. 4-Arm-PEG10000-Maleimide efficiently conjugates biomolecules via thiol-Michael reaction, and is widely used in protein modification, antibody-drug conjugation and biomaterial preparation .

HY-134428

Arachidonoyl coenzyme A lithium	Biochemical Assay Reagents
Arachidonoyl coenzyme A lithium is an unsaturated fatty acyl coenzyme A, formed by the condensation of the thiol group of coenzyme A with the carboxyl group of arachidonic acid .

HY-W1048527

8-Arm PEG5000-SH 8-Arm PEG5000-thiol	Biochemical Assay Reagents
8-Arm PEG5000-SH (8-Arm PEG5000-Thiol) is a multi-arm PEG derivative with thiol groups at each end of the eight arms. 8-Arm PEG5000-SH can be used for drug delivery .

HY-W020780C

mPEG3400-Mal mPEG3400-Maleimide	Biochemical Assay Reagents
mPEG3400-Mal is a PEG derivative used for thiol pegylation of protein molecules. Its maleimide group (-Mal) degrades in aqueous media and finds application in drug delivery studies.

HY-155901

Mal-NH-PEG2000-NH2 TFA Maleimide-NH-PEG2000-amine TFA	Biochemical Assay Reagents
Mal-NH-PEG2000-NH2TFA is a PEG derivative that may be used for thiol PEGylation of protein molecules. Its maleimide group (-Mal) degrades in aqueous media and finds application in drug delivery studies.

HY-W1048553B

Mal-PEG3400-NH2 TFA 1 Publications Verification	Biochemical Assay Reagents
Mal-PEG3400-NH2TFA is a linear heterobifunctional PEG product with maleimide and NH2 groups. The maleimide can react with thiols, SH, sulfhydryls or sulfhydryls, and the amine can react with carboxylic acids or activated NHS esters .

HY-W1048553C

Mal-PEG5000-NH2 TFA	Biochemical Assay Reagents
Mal-PEG5000-NH2TFA is a linear heterobifunctional PEG product with maleimide and NH2 groups. The maleimide can react with thiols, SH, sulfhydryls or sulfhydryls, and the amine can react with carboxylic acids or activated NHS esters .

HY-W1048549C

HOOC-PEG5000-SH HOOC-PEG5000-thiol	Biochemical Assay Reagents
HOOC-PEG5000-SH (HOOC-PEG5000-Thiol) is a reactive thiol PEG derivative with a terminal carboxyl group. The carboxyl group can react with amine or hydroxyl groups to form a stable amide bond or an unstable ester bond. The PEG linkage between the thiol and carboxyl groups has good water solubility, flexible linker distance and higher stability .

HY-W1048849D

4-Arm PEG40000-SH 4-Arm PEG40000-thiol	Biochemical Assay Reagents
4-Arm PEG40000-SH (4-Arm PEG40000-thiol) is a multi-arm PEG derivative with thiol groups at each end of the four arms. The reactive free thiol, SH or sulfhydryl groups react selectively with maleimide and transition metal surfaces including gold and silver .

HY-W1048527A

8-Arm PEG20000-SH 8-Arm PEG20000-thiol	Biochemical Assay Reagents
8-Arm PEG20000-SH (8-Arm PEG20000-Thiol) is a multi-arm PEG derivative with thiol groups at each end of the eight arms. 8-Arm PEG20000-SH can be used for drug delivery .

HY-W1048527C

8-Arm PEG10000-SH 8-Arm PEG10000-thiol	Biochemical Assay Reagents
8-Arm PEG10000-SH (8-Arm PEG10000-Thiol) is a multi-arm PEG derivative with thiol groups at each end of the eight arms. 8-Arm PEG10000-SH can be used for drug delivery .

HY-174965H

DBCO-PEG10000-SH DBCO-PEG10000-thiol	Biochemical Assay Reagents
DBCO-PEG10000-SH (DBCO-PEG10000-Thiol) is a DBCO-modified PEG derivative. DBCO-PEG10000-SH contains a DBCO group and can undergo a strain-promoted alkyne-azide cycloaddition reaction (SPAAC) with molecules containing an azide group .

HY-174965D

DBCO-PEG3400-SH DBCO-PEG3400-thiol	Biochemical Assay Reagents
DBCO-PEG3400-SH (DBCO-PEG3400-Thiol) is a DBCO-modified PEG derivative. DBCO-PEG3400-SH contains a DBCO group and can undergo a strain-promoted alkyne-azide cycloaddition reaction (SPAAC) with molecules containing an azide group .

HY-174965B

DBCO-PEG1000-SH DBCO-PEG1000-thiol	Biochemical Assay Reagents
DBCO-PEG1000-SH (DBCO-PEG1000-Thiol) is a DBCO-modified PEG derivative. DBCO-PEG1000-SH contains a DBCO group and can undergo a strain-promoted alkyne-azide cycloaddition reaction (SPAAC) with molecules containing an azide group .

HY-W1048553

Mal-PEG1000-NH2 TFA	Biochemical Assay Reagents
Mal-PEG1000-NH2TFA is a linear heterobifunctional PEG product with maleimide and NH2 groups. The maleimide can react with thiols, SH, sulfhydryls or sulfhydryls, and the amine can react with carboxylic acids or activated NHS esters .

HY-157920

Biotin-PE-maleimide N-Biotinyl-N'-[2-(N-maleimido)ethyl]piperazine	Biochemical Assay Reagents
Biotin-PE-maleimide (N-Biotinyl-N'-[2-(N-maleimido)ethyl]piperazine) is a bulky, membrane-impermeable, sulfhydryl-containing reagent with a relatively large molecular size. Biotin-PE-maleimide can be used for biotin labeling (such as thiol groups) and detection of proteins or other biomolecules .

HY-W1048555B

Mal-PEG3400-SCM

Biochemical Assay Reagents

Mal-PEG3400-SCM is a linear hetero-bifunctional PEG product with maleimide and succinimidyl NHS ester groups. Mal-PEG3400-SCM is an important cross-linker with PEG chains. Maleimide reacts with thiols, SH, sulfhydryls or sulfhydryls, and SCM stands for succinimidyl carboxymethyl ester, which reacts with primary amines. Maleimide contains a reactive C=C double bond and is sensitive to light or oxygen .

HY-W1048549E

HOOC-PEG20000-SH HOOC-PEG20000-thiol	Biochemical Assay Reagents
HOOC-PEG20000-SH (HOOC-PEG20000-Thiol) is a reactive thiol PEG derivative with a terminal carboxyl group. The carboxyl group can react with amine or hydroxyl groups to form a stable amide bond or an unstable ester bond. The PEG linkage between the thiol and carboxyl groups has good water solubility, flexible linker distance and higher stability .

HY-174949B

FMOC-NH-PEG3400-SH

FMOC-NH-PEG3400-thiol

Biochemical Assay Reagents

FMOC-NH-PEG3400-SH (FMOC-NH-PEG3400-Thiol) is a PEG derivative with an Fmoc protecting group and a thiol (-SH) reactive group. The thiol group is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds. Fmoc is a commonly used amino protecting group that protects the amino group from unwanted reactions until it is removed when a specific coupling reaction is required.

HY-W441003

DSPE-PEG2000-IA	Biochemical Assay Reagents
DSPE-PEG2000-IA is a thiol reactive phospholipid polyPEG. The iodoacetyll group is reactive with thiol to produce a thioether linkage. The polymer can self-assemble in water to form lipid bilayer and can be used to encapsulate drugs in targeted delivery application, such as liposomal doxorubicin as an anti cancer drug or mRNA vaccine.

HY-W020780A

mPEG350-Mal mPEG350-Maleimide	Biochemical Assay Reagents
mPEG350-Mal is a PEG derivative used for thiol PEGylation of protein molecules. Its maleimide group (-Mal) degrades in aqueous media and finds application in drug delivery studies.

HY-W020780B

mPEG750-Mal mPEG750-Maleimide	Biochemical Assay Reagents
mPEG750-Mal is a PEG derivative used for thiol pegylation of protein molecules. Its maleimide group (-Mal) degrades in aqueous media and finds application in drug delivery studies.

HY-168938

Poly(ethylene glycol) methyl ether maleimide (Mn 2000)	Biochemical Assay Reagents
Poly(ethylene glycol) methyl ether maleimide (Mn 2000) is a polyethylene glycol containing Maleimide (HY-W007324). Due to the Maleimide functional group, Poly(ethylene glycol) methyl ether maleimide (Mn 2000) can be used to conjugate biomolecules containing thiol groups.

HY-W1048553H

Mal-PEG40000-NH2 TFA	Biochemical Assay Reagents
Mal-PEG40000-NH2TFA is a linear heterobifunctional PEG product with maleimide and NH2 groups. The maleimide can react with thiols, SH, sulfhydryls or sulfhydryls, and the amine can react with carboxylic acids or activated NHS esters .

HY-W1048553E

Mal-PEG20000-NH2 TFA	Biochemical Assay Reagents
Mal-PEG20000-NH2TFA is a linear heterobifunctional PEG product with maleimide and NH2 groups. The maleimide can react with thiols, SH, sulfhydryls or sulfhydryls, and the amine can react with carboxylic acids or activated NHS esters .

HY-W1048553D

Mal-PEG10000-NH2 TFA	Biochemical Assay Reagents
Mal-PEG10000-NH2TFA is a linear heterobifunctional PEG product with maleimide and NH2 groups. The maleimide can react with thiols, SH, sulfhydryls or sulfhydryls, and the amine can react with carboxylic acids or activated NHS esters .

HY-W440902

DSPE-PEG3400-IA	Biochemical Assay Reagents
DSPE-PEG3400-IA is an iodoacetyll PEG lipid. The polymer can form lipid bilayer or micelles spontaneoulsy in water. The lipophilic tails can be used to encapsulate hydrophobic therapeutic agents while the hydrophilic head can be used to encapuslate hydrophilic drugs/nutrient, such as antibody, mRNA/DNA. The iodoacetyl group is reactive with thiol to produce a thioether linkage.

HY-W060216

N-Acetyl-DL-penicillamine

Biochemical Assay Reagents

2-Acetamido-3-methyl-3-sulfanylbutanoic acid is an organic compound that belongs to the class of amino acids. It is a derivative of methionine, an essential amino acid commonly found in various foods. 2-Acetamido-3-methyl-3-sulfanylbutanoic acid contains a thiol group and an acetamido group at specific positions in the amino acid chain. It has various applications in the food industry, especially as a flavor enhancer and umami seasoning. Additionally, it has potential research utility in liver disease and other metabolic disorders.

HY-W1048555D

Mal-PEG10000-SCM

Biochemical Assay Reagents

Mal-PEG10000-SCM is a linear hetero-bifunctional PEG product with maleimide and succinimidyl NHS ester groups. Mal-PEG10000-SCM is an important cross-linker with PEG chains. Maleimide reacts with thiols, SH, sulfhydryls or sulfhydryls, and SCM stands for succinimidyl carboxymethyl ester, which reacts with primary amines. Maleimide contains a reactive C=C double bond and is sensitive to light or oxygen .

HY-W1048555

Mal-PEG1000-SCM

Biochemical Assay Reagents

Mal-PEG1000-SCM is a linear hetero-bifunctional PEG product with maleimide and succinimidyl NHS ester groups. Mal-PEG1000-SCM is an important cross-linker with PEG chains. Maleimide reacts with thiols, SH, sulfhydryls or sulfhydryls, and SCM stands for succinimidyl carboxymethyl ester, which reacts with primary amines. Maleimide contains a reactive C=C double bond and is sensitive to light or oxygen .

HY-W1048549H

HOOC-PEG1000-SH

HOOC-PEG1000-thiol

Biochemical Assay Reagents

HOOC-PEG1000-SH (HOOC-PEG1000-Thiol) is a reactive thiol PEG derivative with a terminal carboxyl group. The carboxyl group can react with amine or hydroxyl groups to form a stable amide bond or an unstable ester bond. The reaction of the carboxyl group allows the amine or hydroxyl group to be converted into a free thiol with a linear PEG linkage. The generated thiol group can be used to modify the surface of gold nanoparticles or participate in other PEGylation reactions. The PEG linkage between the thiol and carboxyl groups has good water solubility, flexible linker distance and higher stability .

HY-W1048549J

HOOC-PEG40000-SH

HOOC-PEG40000-thiol

Biochemical Assay Reagents

HOOC-PEG40000-SH (HOOC-PEG40000-Thiol) is a reactive thiol PEG derivative with a terminal carboxyl group. The carboxyl group can react with amine or hydroxyl groups to form a stable amide bond or an unstable ester bond. The reaction of the carboxyl group allows the amine or hydroxyl group to be converted into a free thiol with a linear PEG linkage. The generated thiol group can be used to modify the surface of gold nanoparticles or participate in other PEGylation reactions. The PEG linkage between the thiol and carboxyl groups has good water solubility, flexible linker distance and higher stability .

Cat. No.	Product Name	Target	Research Area

HY-P4094

CTP 2 Publications Verification Cardiac targeting peptide	Peptides	Cardiovascular Disease
CTP (cardiac targeting peptide) can transduce cardiomyocytes in vitro. CTP leads to efficient and specific transduction of heart tissue in mice model. CTP can be reversibly linked (e.g. via enolases, thiol groups) to cargo (e.g. miRNAs) for delivery specifically to cardiomyocytes over all other organs .

HY-P11308

Cys-GE11	EGFR	Cancer
Cys-GE11 is an N-terminal modified GE11 (HY-P10128) with cysteine (Cys) added. Cys-GE11 can be coupled through the thiol group of Cys. Cys-GE11 can be linked to PEG-P (TMC-DTC) through the N-terminus of cysteine to form a targeted polymer. Cys-GE11 can target cells with high EGFR expression (such as SMMC-7721 cells). Cys-GE11 can significantly enhance drug enrichment at the tumor site and exhibit low toxicity .

HY-P4087

Cys(Npys)-(Arg)9	HIV	Infection Cancer
Cys(Npys)-(Arg)9 is a synthetic cationic cell-penetrating peptide with a reversible thiol-reactive nitropyridyl (Npys) group. Cys(Npys)-(Arg)9 efficiently mediates the internalization and delivery of various "cargo" such as proteins and antibodies by forming reversible disulfide bonds with surface-exposed cysteine residues. Cys(Npys)-(Arg)9 endows TALEN proteins with cell-penetrating activity, enabling gene knockout in mammalian cells and protein transduction in wheat microspores. Cys(Npys)-(Arg)9 can be conjugated with antibodies to form cationized IgG for enhancing endosomal escape of oligonucleotides, or form siRNA delivery complexes. When the molar ratio of Cys(Npys)-(Arg)9 to loaded molecules is higher than 1:1, it exerts certain cytotoxic effects on cells. Cys(Npys)-(Arg)9 can be used in studies related to oral squamous cell carcinoma and HIV infection .

HY-P4087B

Cys(Npys)-(Arg)9 acetate	HIV	Others
Cys(Npys)-(Arg)9 acetate is a synthetic cationic cell-penetrating peptide with a reversible thiol-reactive nitropyridyl (Npys) group. Cys(Npys)-(Arg)9 acetate efficiently mediates the internalization and delivery of various "cargo" such as proteins and antibodies by forming reversible disulfide bonds with surface-exposed cysteine residues. Cys(Npys)-(Arg)9 acetate endows TALEN proteins with cell-penetrating activity, enabling gene knockout in mammalian cells and protein transduction in wheat microspores. Cys(Npys)-(Arg)9 acetate can be conjugated with antibodies to form cationized IgG for enhancing endosomal escape of oligonucleotides, or form siRNA delivery complexes. When the molar ratio of Cys(Npys)-(Arg)9 acetate to loaded molecules is higher than 1:1, it exerts certain cytotoxic effects on cells. Cys(Npys)-(Arg)9 acetate can be used in studies related to oral squamous cell carcinoma and HIV infection .

HY-P11697

Fmoc-PNA-maleimide-OH	Drug Intermediate	Others
Fmoc-PNA-maleimide-OH is a Fmoc-protected functionalized peptide nucleic acid monomer featuring a maleimide group for thiol-reactive conjugation. Fmoc-PNA-maleimide-OH can be used in constructing PNA conjugates for molecular assembly applications.

HY-P11781A

Cys-HW12	Drug Derivative	Cancer
Cys-HW12 is a random peptide containing an N-terminal cysteine. Cys-HW12 can be coupled via the thiol group of Cys. Cys-HW12 can serve as a control for GE11 (HY-P10128)-conjugated mixed micelles targeting EGFR, and also functions as a cytotoxic agent, cellular uptake inhibitor, and tumor growth inhibitor. Cys-HW12 is applicable to pancreatic cancer-related research .

Cat. No.	Product Name		Classification

HY-138525

Azido-PEG4-Thiol		Azide PROTAC Synthesis
Azido-PEG4-Thiol is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs . Azido-PEG4-Thiol is a click chemistry reagent, it contains an Azide group and can undergo copper-catalyzed azide-alkyne cycloaddition reaction (CuAAc) with molecules containing Alkyne groups. It can also undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules containing DBCO or BCN groups.

HY-W872575

TCO4-PEG3-Maleimide		TCO PROTAC Synthesis
TCO4-PEG3-Maleimide is a PROTAC linker and belongs to the PEG class. TCO4-PEG3-Maleimide contains TCO and Maleimide groups, which can undergo specific "click" reactions with tetrazine groups or thiol groups, or "mercapto-acrylamide" reactions.

HY-W879048

DBCO-PEG24-Maleimide		DBCO
DBCO-PEG24-Maleimide contains a maleimide and a DBCO group. DBCO-PEG24-Maleimide can be used for thiol-containing biomolecule conjugations. DBCO-PEG24-Maleimide can be used in click chemistry with azide-bearing biomolecules .

HY-116427

Propargyl-PEG4-thiol		Alkynes ADC Synthesis PROTAC Synthesis
Propargyl-PEG4-thiol is a PEG-based PROTAC linker can be used in the synthesis of PROTACs. Propargyl-PEG4-thiol is a non-cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs) . Propargyl-PEG4-thiol is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.

HY-156392

TCO4-PEG7-Maleimide		TCO
TCO4-PEG7-Maleimide is a PROTAC linker and belongs to the PEG class. TCO4-PEG7-Maleimide contains TCO and Maleimide groups, which can undergo specific "click" reactions with tetrazine groups or thiol groups, or "mercapto-acrylamide" reactions.

HY-174965H

DBCO-PEG10000-SH DBCO-PEG10000-thiol		DBCO
DBCO-PEG10000-SH (DBCO-PEG10000-Thiol) is a DBCO-modified PEG derivative. DBCO-PEG10000-SH contains a DBCO group and can undergo a strain-promoted alkyne-azide cycloaddition reaction (SPAAC) with molecules containing an azide group .

HY-174965D

DBCO-PEG3400-SH DBCO-PEG3400-thiol		DBCO
DBCO-PEG3400-SH (DBCO-PEG3400-Thiol) is a DBCO-modified PEG derivative. DBCO-PEG3400-SH contains a DBCO group and can undergo a strain-promoted alkyne-azide cycloaddition reaction (SPAAC) with molecules containing an azide group .

HY-174965B

DBCO-PEG1000-SH DBCO-PEG1000-thiol		DBCO
DBCO-PEG1000-SH (DBCO-PEG1000-Thiol) is a DBCO-modified PEG derivative. DBCO-PEG1000-SH contains a DBCO group and can undergo a strain-promoted alkyne-azide cycloaddition reaction (SPAAC) with molecules containing an azide group .

HY-136130

N,N-Bis(PEG2-alkyne)-N-amido-PEG2-thiol		Alkynes ADC Synthesis
N,N-Bis(PEG2-alkyne)-N-amido-PEG2-thiol is a cleavable 4 unit PEG ADC linker used in the synthesis of antibody-drug conjugates (ADCs) . N,N-Bis(PEG2-alkyne)-N-amido-PEG2-thiol is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.

HY-136129

N,N-Bis(PEG2-N3)-N-amido-PEG2-thiol		ADC Synthesis Azide
N,N-Bis(PEG2-N3)-N-amido-PEG2-thiol is a cleavable 4 unit PEG ADC linker used in the synthesis of antibody-drug conjugates (ADCs) . N,N-Bis(PEG2-N3)-N-amido-PEG2-thiol is a click chemistry reagent, it contains an Azide group and can undergo copper-catalyzed azide-alkyne cycloaddition reaction (CuAAc) with molecules containing Alkyne groups. It can also undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules containing DBCO or BCN groups.

HY-156391A

(R)-TCO4-PEG2-Maleimide		TCO
TCO4-PEG2-Maleimide is a PROTAC linker and belongs to the PEG class. TCO4-PEG2-Maleimide contains TCO and Maleimide groups, which can undergo specific "click" reactions with tetrazine groups or thiol groups, or "mercapto-acrylamide" reactions.

HY-156391

TCO4-PEG2-Maleimide		TCO
TCO4-PEG2-Maleimide is a PROTAC linker and belongs to the PEG class. TCO4-PEG2-Maleimide contains TCO and Maleimide groups, which can undergo specific "click" reactions with tetrazine groups or thiol groups, or "mercapto-acrylamide" reactions.

HY-W872575A

(R)-TCO4-PEG3-Maleimide		TCO
TCO4-PEG3-Maleimide is a PROTAC linker and belongs to the PEG class. TCO4-PEG3-Maleimide contains TCO and Maleimide groups, which can undergo specific "click" reactions with tetrazine groups or thiol groups, or "mercapto-acrylamide" reactions.

HY-D1404

5MP-Propargyl		Alkynes
5MP-Propargyl is the derivative of 5-Methylene pyrrolone (5MP). 5-Methylene pyrrolones (5MPs) are thiol-specific, reversible bioconjugation reagents for cysteine-specific protein modification, that are commonly used for protein bioconjugation . 5MP-Propargyl is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.

HY-D1407

Br-5MP-Propargyl		Alkynes
Br-5MP-Propargyl is the derivative of 5-Methylene pyrrolone (5MP). 5-Methylene pyrrolones (5MPs) are thiol-specific, reversible bioconjugation reagents for cysteine-specific protein modification, that are commonly used for protein bioconjugation . Br-5MP-Propargyl is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.

HY-183022

3-Azidopropyl-1-maleimide		Azide
1-(3-Azidopropyl)-1H-pyrrole-2,5-dione is a maleimide derivative with a 3-azidopropyl substituent, used to introduce an azide functional group to bovine serum albumin (BSA). 1-(3-Azidopropyl)-1H-pyrrole-2,5-dione reacts with the free, solvent-accessible thiol group of BSA to produce azide-functionalized BSA, which is used in click chemistry to form a TLL-BSA hetero-dimer .

HY-W591360

Iodoacetamido-PEG6-azide		Azide
Iodoacetamido-PEG6-azide is an aqueous soluble PEG linker containing an azide and a terminal Iodoacetamido group. The azide group can react with alkyne, BCN, DBCO via Click Chemistry to yield a stable triazole linkage. The Iodoacetamido moiety is commonly used to bind covalently with the thiol group of cysteine so the protein cannot form disulfide bonds.

Cat. No.	Product Name		Classification

HY-166648

DSPE-PEG2000-Maleimide sodium (purity>99%) 1 Publications Verification		Pegylated Lipids
DSPE-PEG2000-Maleimide sodium (purity>99%) is a functional lipid component and a thiol-reactive crosslinker. DSPE-PEG2000-Maleimide sodium (purity>99%) undergoes Michael addition with the thiol groups of thiolated or cyclic RGD peptides to form stable thioether bonds and DSPE-PEG2000-RGD. DSPE-PEG2000-Maleimide sodium (purity>99%) is applicable to research on drug delivery .

HY-W440896

DSPE-PEG2000-SH		Pegylated Lipids
DSPE-PEG2000-SH is an amphiphilic thiol-functionalized DSPE-PEG molecule. DSPE-PEG2000-SH inserts into extracellular vesicle (EV) bilayer membranes via hydrophobic interactions, displaying surface thiol groups to form EV-SH crosslinkers.DSPE-PEG2000-SH enables crosslinking of EV-SH with 8-arm PEG-norbornene via thiol-ene photochemistry to construct hydrogels, with hydrogel mechanical properties tunable via PEG segment molecular weight variation.DSPE-PEG2000-SH can be used to encapsulate agents for drug delivery system, such as mRNA vaccine .

HY-W591476

m-PEG1000-thiol mPEG1000-SH		Polymers
m-PEG1000-thiol is a surface modifier that can modify DNA thiolation and is used in the synthesis of gold nanorods (AuNR). m-PEG1000-thiol can load thiolated DNA onto AuNR, form a covalent bond with the surface of gold nanoparticles through the thiol group, and stabilize the nanoparticles by the steric hindrance effect of the polyethylene glycol chain, preventing aggregation and enhancing its biocompatibility. m-PEG1000-thiol can also provide a platform for the subsequent coupling of biomolecules (such as DNA, antibodies) by replacing surfactants (such as CTAB) on the surface of nanoparticles, thereby exerting its activity in promoting the functionalization of nanomaterials [2].

HY-166648A

DSPE-PEG-Maleimide ammonium (MW 2000) 1 Publications Verification		Pegylated Lipids
DSPE-PEG-Maleimide ammonium (MW 2000) is a functional lipid component and a thiol-reactive crosslinker. DSPE-PEG-Maleimide ammonium (MW 2000) undergoes Michael addition with the thiol groups of thiolated or cyclic RGD peptides to form stable thioether bonds and DSPE-PEG (2000)-RGD. DSPE-PEG-Maleimide ammonium (MW 2000) is applicable to research on drug delivery .

HY-W441004

DSPE-Thiol		Phospholipids
DSPE-Thiol is a phophalipid capped with thiol group. The thiol capped head can selectively react with maleimide. DSPE-Thiol can also be used for the preparation of phospholipid dimers .

HY-W020780C

mPEG3400-Mal mPEG3400-Maleimide		Polymers
mPEG3400-Mal is a PEG derivative used for thiol pegylation of protein molecules. Its maleimide group (-Mal) degrades in aqueous media and finds application in drug delivery studies.

HY-155901

Mal-NH-PEG2000-NH2 TFA Maleimide-NH-PEG2000-amine TFA		Polymers
Mal-NH-PEG2000-NH2TFA is a PEG derivative that may be used for thiol PEGylation of protein molecules. Its maleimide group (-Mal) degrades in aqueous media and finds application in drug delivery studies.

HY-W590555

Thiol-PEG2000-DMG		Pegylated Lipids
Thiol-PEG2000-DMG is a phospholipid polyPEG which can be used to prepare liposomes or nanoparticles. The terminal thiol group reacts with maleimide, OPSS, vinylsulfone and transition metal surfaces including gold, silver, etc.

HY-W800787

18:1 PE MCC		Phospholipids
18:1 PE MCC is a maleimide-functionalized thiol-reactive lipid with a phosphoethanolamine linked to two oleic acid tails and a maleimide group.

HY-W800786

16:0 PE MCC N-MCC-PE		Phospholipids
16:0 PE MCC is a maleimide-functionalized thiol-reactive lipid with a phosphoethanolamine linked to two palmitic acid tails and a maleimide group.

HY-W800789

16:0 MPB PE		Phospholipids
16:0 MPB PE is a maleimide-functionalized thiol-reactive lipid with a phosphoethanolamine linked to two palmitic acid tails and a phenyl maleimide group.

HY-W800788

18:1 MPB PE		Phospholipids
18:1 MPB PE is a maleimide-functionalized thiol-reactive lipid with a phosphoethanolamine linked to two oleic acid tails and a phenyl maleimide group.

HY-W020780A

mPEG350-Mal mPEG350-Maleimide		Polymers
mPEG350-Mal is a PEG derivative used for thiol PEGylation of protein molecules. Its maleimide group (-Mal) degrades in aqueous media and finds application in drug delivery studies.

HY-W020780B

mPEG750-Mal mPEG750-Maleimide		Polymers
mPEG750-Mal is a PEG derivative used for thiol pegylation of protein molecules. Its maleimide group (-Mal) degrades in aqueous media and finds application in drug delivery studies.

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