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sulfhydryl groups

" in MedChemExpress (MCE) Product Catalog:

By Targets:	ADC Linker (5) Biochemical Assay Reagents (3) Cathepsin (1) Deubiquitinase (1) Drug-Linker Conjugates for ADC (1) Fluorescent Dye (10) Fungal (1) Glutaminase (1) HIV Protease (1) Microtubule/Tubulin (1) Mitochondrial Metabolism (1) NF-κB (1)
By Research Areas:	Cancer (9) Infection (1) Inflammation/Immunology (2) Neurological Disease (1)

Inhibitors & Agonists

Fluorescent Dye

Biochemical Assay Reagents

Natural
Products

Isotope-Labeled Compounds

Cat. No.	Product Name	Target	Research Areas	Chemical Structure

HY-121167

L-Albizziin

Glutaminase Cancer

L-albizziin, as a sulfhydryl group reagent, is a glutamase inhibitor. L-albizziin can be used for the research of cancer .

L-Albizziin	Glutaminase	Cancer
L-albizziin, as a sulfhydryl group reagent, is a glutamase inhibitor. L-albizziin can be used for the research of cancer .

HY-Y1666

2,2′-Dipyridyl disulfide	Biochemical Assay Reagents	Others
2,2′-Dipyridyl disulfide is a useful reagent for the determination of sulfhydryl groups. 2,2′-Dipyridyl disulfide is a common reagent in peptide chemistry, often used in oxidation–reduction condensations to form peptide bonds or in coupling reactions to form disulfide-linked heterodimers .

HY-119970

Helenalin 4 Publications Verification	NF-κB	Inflammation/Immunology Cancer
Helenalin is an anti-inflammatory sesquiterpene lactone. Helenalin selectively inhibits transcription factor NF-κB by directly targeting p65. Helenalin has alkylating activity, targets the cysteine sulfhydryl groups in the p65 subunit of NF-κB, thereby inhibits its DNA binding .

HY-D1618

Cyanine3 maleimide tetrafluoroborate	Fluorescent Dye	Others
Cyanine3 maleimide tetrafluoroborate is a specific labeling reagent for sulfhydryl groups with the λ_ex of 550 nm and λ_em of 580 nm. Cyanine3 maleimide tetrafluoroborate can be used for protein and peptide labeling .

HY-D1654

BDP 581/591 maleimide	Fluorescent Dye	Others
BDP 581/591 maleimide is a linker of the BDP 581/591 dye. It has a long fluorescence lifetime and can be used for fluorescence polarization assays. The maleimide group can react with thiol groups to form thioester bonds between pH 6.5 to 7.5, for the labeling of sulfhydryl groups of proteins and peptides.

HY-100216

SPDP 4 Publications Verification SPDP Crosslinker	ADC Linker	Cancer
SPDP (SPDP Crosslinker) is a short-chain crosslinker for amine-to-sulfhydryl conjugation via NHS-ester and pyridyldithiol reactive groups that form cleavable (reducible) disulfide bonds with cysteine sulfhydryls. It is a glutathione cleavable ADC linker used for the antibody-drug conjugates (ADCs) .

HY-128925

AMAS 1 Publications Verification	ADC Linker	Cancer
AMAS is a nonclaevable heterobifunctional crosslinker with NHS ester and maleimide groups that allows covalent conjugation of amine- and sulfhydryl-containing molecules.

HY-D2182

Preactivated PE-Cy5 Maleimide	Fluorescent Dye	Others
Preactivated PE-Cy5 Maleimide is a sulfhydryl reactive dye that reacts with free sulfhydryl groups on proteins. Preactivated APC-Cy5.5 Maleimide binds easily to proteins or antibodies, and does not change the spectral characteristics of APC-Cy/YF after activation.

HY-D2180

Preactivated APC-Cy5.5 Maleimide	Fluorescent Dye	Others
Preactivated APC-Cy5.5 Maleimide is a sulfhydryl reactive dye that reacts with free sulfhydryl groups on proteins. Preactivated APC-Cy5.5 Maleimide binds easily to proteins or antibodies, and does not change the spectral characteristics of APC-Cy/YF after activation.

HY-D0975

Sulfo-SMCC sodium 3 Publications Verification	ADC Linker	Cancer
Sulfo-SMCC sodium is a commonly used hetero-bifunctional, noncleavable ADC crosslinker bearing N-hydroxysuccinimide (NHS) ester and maleimide groups to react with primary amines and sulfhydryl groups, respectively.

HY-126493

DM4-SPDP	Drug-Linker Conjugates for ADC Microtubule/Tubulin	Cancer
DM4-SPDP is a agent-linker conjugate composed of a potent antitubulin agent DM4 and a linker SMCC to make antibody agent conjugate . SPDP is a short-chain crosslinker for amine-to-sulfhydryl conjugation via NHS-ester and pyridyldithiol reactive groups that form cleavable (reducible) disulfide bonds with cysteine sulfhydryls .

HY-N7594

Senecionine acetate O-Acetylsenecionine	Mitochondrial Metabolism	Others
Senecionine acetate (O-Acetylsenecionine) is a pyrrolizidine alkaloid. Senecionine acetate inhibits the sequestration of Ca ²⁺ in extramitochondrial and mitochondrial compartments possibly by inactivating free sulfhydryl groups .

HY-141540

Lactyl-CoA	Others	Others
Lactyl-CoA is an acyl-CoA formally condensed from the sulfhydryl group of CoA and the carboxyl group of lactic acid, also known as lactyl-CoA. Lactyl-CoA is essential for the biosynthesis of biodegradable and biocompatible lactic acid-based copolymers .

HY-129655

Sulfo-SMPB sodium	ADC Linker	Cancer
Sulfo-SMPB sodium is a non-cleavable, heterobifunctional chemical cross-linking reagent which contains N-hydroxysuccinimide (NHS) ester and maleimide groups, allowing covalent conjugation of amine- and sulfhydryl-containing molecules .

HY-135233

N-Succinimidyl-S-acetylthioacetate SATA	Biochemical Assay Reagents	Others
N-Succinimidyl S-acetylthioacetate (SATA), a protein modification agent, introduces thiol-groups into protein molecules. N-Succinimidyl S-acetylthioacetate adds sulfhydryl groups to proteins and other amine-containing molecules in a protected form .

HY-D1869

800CW maleimide	Fluorescent Dye	Others
800CW maleimide is an infrared dye that can be used for labeling molecules that contain free sulfhydryl (–SH) groups (Ex: 778 nm; Em: 796 nm). 800CW maleimide binds to plasma proteins .

HY-78961

6-Maleimidohexanoic acid N-hydroxysuccinimide ester EMCS	ADC Linker	Cancer
6-Maleimidohexanoic acid N-hydroxysuccinimide ester (EMCS) is a heterobifunctional cross-linking reagent. EMCS is used as a unique and useful reagent for preparation of hapten conjugate and enzyme immunoconjugates .

HY-D1730

AF488 NHS ester	Fluorescent Dye	Others
AF488 NHS ester is an amine specific fluorescence probe (Em=525 nm). AF488 NHS ester reacts with sulfhydryl groups and amines in aqueous and biological samples then change their chemical structure and fluorescence properties after derivatization .

HY-D2094

PerCP Maleimide	Fluorescent Dye	Inflammation/Immunology Cancer
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-N6773

Cytochalasin A	HIV Protease Fungal	Infection
Cytochalasin A is a cell-permeable fungal toxin that is an oxidized derivative of cytochalasin B. Cytochalasin A is an inhibitor of HIV-1 protease (IC₅₀=3 μM) and inhibits actin polymerization and interferes with microtubule assembly by reacting with sulfhydryl groups. Antibiotic and fungicidal activitives .

HY-D1260

FM-red PSH-red	Fluorescent Dye	Neurological Disease
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-D0843S

N-Ethylmaleimide-d5 NEM-d₅	Cathepsin Deubiquitinase	Others
N-Ethylmaleimide-d₅ is the deuterium labeled N-Ethylmaleimide. N-Ethylmaleimide (NEM), a reagent that alkylates free sulfhydryl groups, is a cysteine protease inhibitor[1]. N-ethylmaleimide specific inhibits phosphate transport in mitochondria[2]. N-Ethylmaleimide is also a deubiquitinating enzyme inhibitor[3].

HY-D1363

BDP R6G maleimide	Fluorescent Dye	Others
BDP R6G maleimide is a borodipyrromethane fluorophore with absorption and emission wavelengths similar to those of R6G rhodamine. Sulfhydryl labelling is a common protein modification where the cysteine residues in the protein allow more site-specific labelling than the NHS ester of the amine group. BDP R6G maleimide is a thiol reactive dye that reacts with thiol groups to form thioester bonds .

HY-15917A

L-Dithiothreitol	Biochemical Assay Reagents	Others
L-Dithiothreitol (DTT) is a reducing agent commonly used in various biochemical applications to break disulfide bonds in proteins, thereby denaturing proteins or preventing the formation of unwanted aggregates. DTT has a unique chemical property that cleaves the sulfur-sulfur bond in the disulfide bond to form a sulfhydryl group. This makes it a useful tool for protein purification, enzyme assays, and protein structure studies.

HY-66019

FITC Maximum Cited Publications 35 Publications Verification Fluorescein 5-isothiocyanate	Fluorescent Dye	Others
FITC (Fluorescein Isothiocyanate), is one of the green fluorescein derivatives widely used in biology. FITC has the characteristics of high absorptivity, excellent fluorescence quantum yield and good water solubility. The isothiocyanate group of FITC can be combined with amino, sulfhydryl, imidazole, tyrosyl, carbonyl and other groups on the protein, so as to achieve protein labeling including antibodies and lectins. In addition to its use as a protein marker, FITC can also be used as a fluorescent protein tracer to rapidly identify pathogens by labeling antibodies, or for microsequencing of proteins and peptides (HPLC). The maximum excitation wavelength of FITC is 494 nm. Once excited, it fluoresces yellow-green at a maximum emission wavelength of 520 nm.

Cat. No.	Product Name	Type

HY-D1618

Cyanine3 maleimide tetrafluoroborate	Dyes
Cyanine3 maleimide tetrafluoroborate is a specific labeling reagent for sulfhydryl groups with the λ_ex of 550 nm and λ_em of 580 nm. Cyanine3 maleimide tetrafluoroborate can be used for protein and peptide labeling .

HY-D1654

BDP 581/591 maleimide	Fluorescent Dyes/Probes
BDP 581/591 maleimide is a linker of the BDP 581/591 dye. It has a long fluorescence lifetime and can be used for fluorescence polarization assays. The maleimide group can react with thiol groups to form thioester bonds between pH 6.5 to 7.5, for the labeling of sulfhydryl groups of proteins and peptides.

HY-D2182

Preactivated PE-Cy5 Maleimide	Fluorescent Dyes/Probes
Preactivated PE-Cy5 Maleimide is a sulfhydryl reactive dye that reacts with free sulfhydryl groups on proteins. Preactivated APC-Cy5.5 Maleimide binds easily to proteins or antibodies, and does not change the spectral characteristics of APC-Cy/YF after activation.

HY-D2180

Preactivated APC-Cy5.5 Maleimide	Fluorescent Dyes/Probes
Preactivated APC-Cy5.5 Maleimide is a sulfhydryl reactive dye that reacts with free sulfhydryl groups on proteins. Preactivated APC-Cy5.5 Maleimide binds easily to proteins or antibodies, and does not change the spectral characteristics of APC-Cy/YF after activation.

HY-D1869

800CW maleimide	Fluorescent Dyes/Probes
800CW maleimide is an infrared dye that can be used for labeling molecules that contain free sulfhydryl (–SH) groups (Ex: 778 nm; Em: 796 nm). 800CW maleimide binds to plasma proteins .

HY-D2094

PerCP Maleimide	Protein Labeling
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-D1260

FM-red PSH-red	Fluorescent Dyes/Probes
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-D1363

BDP R6G maleimide	Fluorescent Dyes/Probes
BDP R6G maleimide is a borodipyrromethane fluorophore with absorption and emission wavelengths similar to those of R6G rhodamine. Sulfhydryl labelling is a common protein modification where the cysteine residues in the protein allow more site-specific labelling than the NHS ester of the amine group. BDP R6G maleimide is a thiol reactive dye that reacts with thiol groups to form thioester bonds .

BDP R6G maleimide

Fluorescent Dyes/Probes

BDP R6G maleimide is a borodipyrromethane fluorophore with absorption and emission wavelengths similar to those of R6G rhodamine. Sulfhydryl labelling is a common protein modification where the cysteine residues in the protein allow more site-specific labelling than the NHS ester of the amine group. BDP R6G maleimide is a thiol reactive dye that reacts with thiol groups to form thioester bonds .

HY-66019

FITC 30+ Cited Publications Fluorescein 5-isothiocyanate	Fluorescent Dyes/Probes
FITC (Fluorescein Isothiocyanate), is one of the green fluorescein derivatives widely used in biology. FITC has the characteristics of high absorptivity, excellent fluorescence quantum yield and good water solubility. The isothiocyanate group of FITC can be combined with amino, sulfhydryl, imidazole, tyrosyl, carbonyl and other groups on the protein, so as to achieve protein labeling including antibodies and lectins. In addition to its use as a protein marker, FITC can also be used as a fluorescent protein tracer to rapidly identify pathogens by labeling antibodies, or for microsequencing of proteins and peptides (HPLC). The maximum excitation wavelength of FITC is 494 nm. Once excited, it fluoresces yellow-green at a maximum emission wavelength of 520 nm.

FITC

30+ Cited Publications

Fluorescein 5-isothiocyanate

Fluorescent Dyes/Probes

FITC (Fluorescein Isothiocyanate), is one of the green fluorescein derivatives widely used in biology. FITC has the characteristics of high absorptivity, excellent fluorescence quantum yield and good water solubility. The isothiocyanate group of FITC can be combined with amino, sulfhydryl, imidazole, tyrosyl, carbonyl and other groups on the protein, so as to achieve protein labeling including antibodies and lectins. In addition to its use as a protein marker, FITC can also be used as a fluorescent protein tracer to rapidly identify pathogens by labeling antibodies, or for microsequencing of proteins and peptides (HPLC). The maximum excitation wavelength of FITC is 494 nm. Once excited, it fluoresces yellow-green at a maximum emission wavelength of 520 nm.

Sulfo-SMCC sodium 3 Publications Verification	Biochemical Assay Reagents
Sulfo-SMCC sodium is a commonly used hetero-bifunctional, noncleavable ADC crosslinker bearing N-hydroxysuccinimide (NHS) ester and maleimide groups to react with primary amines and sulfhydryl groups, respectively.

N-Succinimidyl-S-acetylthioacetate SATA	Biochemical Assay Reagents
N-Succinimidyl S-acetylthioacetate (SATA), a protein modification agent, introduces thiol-groups into protein molecules. N-Succinimidyl S-acetylthioacetate adds sulfhydryl groups to proteins and other amine-containing molecules in a protected form .

L-Dithiothreitol	Biochemical Assay Reagents
L-Dithiothreitol (DTT) is a reducing agent commonly used in various biochemical applications to break disulfide bonds in proteins, thereby denaturing proteins or preventing the formation of unwanted aggregates. DTT has a unique chemical property that cleaves the sulfur-sulfur bond in the disulfide bond to form a sulfhydryl group. This makes it a useful tool for protein purification, enzyme assays, and protein structure studies.

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 .

Cat. No.	Product Name	Category	Target	Chemical Structure

HY-119970

Helenalin 4 Publications Verification	Structural Classification other families Classification of Application Fields Terpenoids Sesquiterpenes Source classification Plants Inflammation/Immunology Disease Research Fields	NF-κB
Helenalin is an anti-inflammatory sesquiterpene lactone. Helenalin selectively inhibits transcription factor NF-κB by directly targeting p65. Helenalin has alkylating activity, targets the cysteine sulfhydryl groups in the p65 subunit of NF-κB, thereby inhibits its DNA binding .

HY-N6773

Cytochalasin A	Infection Alkaloids Microorganisms Pyrrole Alkaloids Classification of Application Fields Source classification Disease Research Fields	HIV Protease Fungal
Cytochalasin A is a cell-permeable fungal toxin that is an oxidized derivative of cytochalasin B. Cytochalasin A is an inhibitor of HIV-1 protease (IC₅₀=3 μM) and inhibits actin polymerization and interferes with microtubule assembly by reacting with sulfhydryl groups. Antibiotic and fungicidal activitives .

HY-N7594

Senecionine acetate O-Acetylsenecionine	Alkaloids Pyrrole Alkaloids Classification of Application Fields Erinacea anthyllis Link Source classification Other Diseases Plants Compositae Disease Research Fields	Mitochondrial Metabolism
Senecionine acetate (O-Acetylsenecionine) is a pyrrolizidine alkaloid. Senecionine acetate inhibits the sequestration of Ca ²⁺ in extramitochondrial and mitochondrial compartments possibly by inactivating free sulfhydryl groups .

Cat. No.	Product Name	Chemical Structure

HY-D0843S

N-Ethylmaleimide-d5
N-Ethylmaleimide-d₅ is the deuterium labeled N-Ethylmaleimide. N-Ethylmaleimide (NEM), a reagent that alkylates free sulfhydryl groups, is a cysteine protease inhibitor[1]. N-ethylmaleimide specific inhibits phosphate transport in mitochondria[2]. N-Ethylmaleimide is also a deubiquitinating enzyme inhibitor[3].

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sulfhydryl groups

Inhibitors & Agonists

Fluorescent Dye

Biochemical Assay Reagents

NaturalProducts

Isotope-Labeled Compounds

Natural
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