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Results for "

probe design

" in MedChemExpress (MCE) Product Catalog:

By Targets:	Biochemical Assay Reagents (6) CDK (1) Cholinesterase (ChE) (1) DAGL (1) DNA/RNA Synthesis (4) Drug Derivative (1) Drug Intermediate (3) Fluorescent Dye (20) Fungal (2) Nucleoside Antimetabolite/Analog (2) PROTACs (1) Radionuclide-Drug Conjugates (RDCs) (2) Reference Standards (1) Wee1 (1)
By Research Areas:	Cancer (10) Cardiovascular Disease (2) Infection (3) Inflammation/Immunology (2) Neurological Disease (3)
Click Chemistry:	Alkynes (1)

Inhibitors & Agonists

Screening Libraries

Fluorescent Dye

Biochemical Assay Reagents

Peptides

Click Chemistry

Cat. No.	Product Name	Target	Research Areas	Chemical Structure

HY-D1041

ICG NHS ester ICG-OSu	Fluorescent Dye	Cancer
ICG NHS ester (ICG-OSu) is a near-infrared fluorescent agent ICG derivative. ICG NHS ester is amine-reactive and has been widely used to design in vivo imaging probes .

HY-162288

FAZ-3532 4 Publications Verification	DNA/RNA Synthesis	Cancer
FAZ-3532 is a G3BP inhibitor (K_d = 0.54 μM) which binds to the NTF2L nsP3 binding pocket in G3BP1. FAZ-3532 disrupts the co-condensation of RNA, G3BP1, and caprin 1. FAZ-3532 inhibits G3BP-driven stress granule formation. FAZ-3532 can be studied as a powerful tool to probe the biology of stress granules and a promising interventions designed to modulate stress granule formation .

HY-134418

NOTA	Radionuclide-Drug Conjugates (RDCs)	Cardiovascular Disease Cancer
NOTA is a bifunctional chelate which acts as the framework to construct PET imaging tools. NOTA also can be used for probe design and signal amplification via the multivalent effect. NOTA can be used in multiple myeloma, breast cancer, lymphoma and myocardial infarction research .

HY-177554

KB05yne	Biochemical Assay Reagents	Cancer
KB05yne is a site-selective, alkyne-functionalized electrophilic "probe" fragment probe designed for covalent ligand discovery, with preferential reactivity toward specific cysteine residues in proteins. KB05yne strongly labels wild-type target proteins (e.g., CDKN2AIP, HPCAL1) but does not label their cysteine-to-alanine mutants, confirming site-specific cysteine reactivity. KB05yne can be used for the discovery and optimization of site-specific covalent ligands, and is applicable to proteins with diverse structures and functions, especially in studies targeting cysteine residues in cancer-related or difficult-to-purify proteins .

HY-135235

Cysteine thiol probe 1 Publications Verification	Fluorescent Dye	Others
Cysteine Thiol Probe is a thiol-based probe designed to label electrophilic natural products. Cysteine Thiol Probe possesses each of the characteristics of an ideal pharmacophore probe, and has a chromophore. Cysteine Thiol Probe is capable of engaging enone-, β-lactam-, and β-lactone-based electrophilic metabolites .

HY-18551

DAGLβ-IN-1	DAGL	Inflammation/Immunology
DAGLβ-IN-1 is an inhibitor of diacylglycerol lipase-β (DAGLβ), serves as a versatile intermediate for the design of DAGL-tailored activity-based probes .

HY-DY1072

ICG NHS ester (solution) ICG-OSu (solution)	Fluorescent Dye	Cancer
ICG NHS ester (ICG-OSu) (solution) is a near-infrared fluorescent agent ICG derivative. ICG NHS ester is amine-reactive and has been widely used to design in vivo imaging probes . Solvent and concentration: DMSO: 10 mM

HY-150175

HKSOX-1	Fluorescent Dye	Inflammation/Immunology
HKSOX-1 and its derivatives (HKSOX-1r and HKSOX-1m) are novel fluorescent probes designed for highly sensitive and selective detection of the superoxide anion radical (O₂ ^•−) in cellular environments. These probes utilize an aryl trifluoromethanesulfonate group that undergoes O₂ ^•−-mediated cleavage, releasing a free phenol and emitting fluorescence. They demonstrate excellent specificity and sensitivity across various pH ranges, withstand interference from strong oxidants and reductants typical in cellular contexts. HKSOX-1r, optimized for cellular retention, has been effectively employed in diverse assays including confocal imaging, flow cytometry, and zebrafish embryo studies, highlighting its utility in investigating O₂ ^•− roles in inflammation, mitochondrial stress, and other physiological processes .

HY-W127832

Ru(dpp)3(PF6)2 1 Publications Verification	Fluorescent Dye	Others
Ru(dpp)3(PF6)2 is a complex containing metallic ruthenium (Ru) and is a chemiluminescent oxygen probe. [Ru(dpp)3] ²⁺ is a luminescent substance that can undergo metal-to-ligand charge transfer (MLCT), and fluorescence will appear during the transfer of Ru to the ligand. At the same time, the fluorescence of Ru(dpp)3(PF6)2 is effectively quenched by molecular oxygen, so it is widely used in biosensors, environmental monitoring, and materials science. The property of Ru(dpp)3(PF6)2, which oxidizes Ru ²⁺ to Ru ³⁺, has also been used to design and construct solid-state light-emitting electrochemical cells .

HY-134418R

NOTA (Standard)	Radionuclide-Drug Conjugates (RDCs) Reference Standards	Cardiovascular Disease Cancer
NOTA (Standard) is the analytical standard of NOTA. This product is intended for research and analytical applications. NOTA is a bifunctional chelate which acts as the framework to construct PET imaging tools. NOTA also can be used for probe design and signal amplification via the multivalent effect. NOTA can be used in multiple myeloma, breast cancer, lymphoma and myocardial infarction research .

HY-164785

TCO-PEG5-C2-Mal	Drug Intermediate	Others
TCO-PEG5-maleimide is a PEG linker with TCO and maleimide groups, specifically enabling tetrazine click chemistry and thiol conjugation for bioconjugation, probe design, and drug delivery.

HY-D2324

EE-Flipper 33	Fluorescent Dye	Others
EE-Flipper 33 is a Flipper probe designed to evaluate the mechanism of early endocytosis. EE-Flipper has a pKa value of 10.6 and is capable of tracking approximately 70% of early endosomes (EE) in live cells. Furthermore, EE-Flipper 33 can also label the Golgi apparatus in live cells with an internal pH ranging from 6.0 to 6.7 .

HY-D2931

SNAP-FAM	Fluorescent Dye	Others
SNAP-FAM is a FAM-labeled SNAP tag fluorescent probe, specifically designed for live-cell protein labeling and real-time imaging applications .

HY-D2949

SNAP-549	Fluorescent Dye	Others
SNAP-549 is a DY-549P1-labeled SNAP tag fluorescent probe, specifically designed for single-molecule imaging and dynamic tracking of proteins in living cells. SNAP-549 only labels SNAP-tag fusion proteins, with low background signals and forming irreversible connections, making it suitable for long-term observation .

HY-W1119950

3'-NH-Tr-2',3'-DMF-ddA- 5'-CE-Phosphoramidite	Nucleoside Antimetabolite/Analog DNA/RNA Synthesis	Others
3'-NH-Tr-2',3'-DMF-ddA-5'-CE-Phosphoramidite is an adenine nucleotide monomer precursor used in solid-phase synthesis of oligonucleotides, particularly modified oligonucleotides, such as those with DNA chain end modifications. 3'-NH-Tr-2',3'-DMF-ddA-5'-CE-Phosphoramidite, with trityl (Tr), cyanoethyl (CE), and dimethylformamidine (DMF) protecting groups, is a ddNTP adenosine nucleoside useful in applications such as solid-phase oligonucleotide synthesis, probe design, and chain-termination sequencing .

HY-145407A

ent-Heronamide C	Fungal	Infection
ent-Heronamide C has antifungal activity and is designed as probe for the mode-of-action analysis of heronamide C .

HY-145407

16,17-Dihydroheronamide C	Fungal	Infection
16,17-Dihydroheronamide C has antifungal activity and is designed as probe for the mode-of-action analysis of heronamide C .

HY-D2954

BC-PEG-NH2 CLIP-PEG-NH2	Drug Intermediate	Others
BC-PEG-NH2 (CLIP-PEG-NH2) is a chemical building block specifically designed for the CLIP-tag system, featuring enhanced water solubility and reactivity. BC-PEG-NH2 can be used for the synthesis of super-resolution imaging probes .

HY-155368

BChE-IN-20	Cholinesterase (ChE)	Neurological Disease
BChE-IN-20 (compound 7c) is a highly potent BChE-selective inhibitor and exhibits IC₅₀s of 105 and 2.3 nM for eqBChE and hBChE, respectively. BChE-IN-20 inhibits P glycoprotein with IC₅₀ of 0.27 μM. BChE-IN-20 is a promising template to improve design and development of BChE-selective ligands of pharmaceutical interest, including inhibitors and fluorogenic probes.

HY-131804A

3'-O-Acetyl-2'-deoxycytidine-5'-O-triphosphate tetrasodium 3'-O-Ac-dCTP tetrasodium	Nucleoside Antimetabolite/Analog DNA/RNA Synthesis	Others
3'-O-Acetyl-2'-deoxycytidine-5'-O-triphosphate (3'-O-Ac-dCTP) tetrasodium is a nucleoside triphosphate derivative with potential applications in DNA synthesis and nucleoside drug design. 3'-O-Acetyl-2'-deoxycytidine-5'-O-triphosphate tetrasodium can be used to inhibit chain elongation reactions and as a terminator or biochemical probe .

HY-D2968

DCM–ONOO	Fluorescent Dye	Neurological Disease
DCM-ONOO is a near-infrared two-photon fluorescence probe specifically designed for real-time monitoring of the dynamic fluctuations of peroxynitrite (ONOO⁻) in epilepsy models. DCM-ONOO exhibits excellent optical properties, with a single photon excitation (Ex) of 520 nm; a single photon emission (Em) of 685 nm; a two-photon excitation of 820 nm; and a Stokes shift of 165 nm. When DCM-ONOO is combined with ONOO⁻, it shifts from 460 nm to 512 nm, and only generates a significant fluorescence response to ONOO⁻. DCM-ONOO has been successfully applied to rat epilepsy models .

HY-173390

BCN-E-BCN	Drug Intermediate Biochemical Assay Reagents	Others
BCN-E-BCN is a strained cycloalkyne-based probe designed for detecting protein sulfenylation, the primary intermediate in protein oxidation. This structurally constrained cycloalkyne compound specifically recognizes sulfenic acid groups formed during thiol oxidation, while remaining completely unreactive toward other oxidative states (such as free thiols, sulfinic, or sulfonic acid groups). Researchers can leverage its efficient conjugation with azide-bearing tags through copper-free click chemistry to amplify detection signals. Compared to conventional detection methods, BCN-E-BCN demonstrates superior reaction kinetics and enhanced sensitivity. With these advantages, BCN-E-BCN shows great promise as an effective tool for protein oxidation research .

HY-D3003

M-H2S	Fluorescent Dye	Others
M-H2S is an endoplasmic reticulum-targeted ratio-type near-infrared fluorescent probe (Ex/Em : 480 nm/560 nm) specifically designed for the detection of hydrogen sulfide (H2S) in living cells and zebrafish. M-H2S exhibits detection limit for H2S of 39.1 nM, and the fluorescence intensity ratio (F₆₅₀/F₅₆₀) within the range of 0-40 μM shows a linear relationship with the H2S concentration. M-H2S responds best under pH = 7.2 (the normal physiological pH of the endoplasmic reticulum) conditions, making it suitable for the detection of the microenvironment of the endoplasmic reticulum. M-H2S can be used to study the role of H2S in endoplasmic reticulum function, stress response, and related diseases .

HY-D3141

DR probe		Cancer
DR probe is a "dual-key-and-lock" fluorescent probe designed based on the Resorufin (HY-123533) scaffold (Ex/Em = 647 nm/663-738 nm). DR probe can be sequentially activated by hydrogen peroxide to form the intermediate SR, which acts as a tyrosinase substrate to trigger a fluorescence turn-on signal. DR probe can distinguish normal melanocytes from melanoma cells. DR probe supports cell imaging and can be applied to mouse melanoma models to achieve melanoma diagnosis with higher accuracy and lower false-positive rates. DR probe is applicable to relevant research on melanoma .

HY-P11684

Fmoc-PNA-C(Boc)-OH	DNA/RNA Synthesis	Others
Fmoc-PNA-C(Boc)-OH is a protected peptide nucleic acid (PNA) monomer for solid-phase synthesis. Fmoc-PNA-C(Boc)-OH possesses Fmoc-protected skeletal amino groups and Boc-protected cytosine bases, designed to construct stable synthetic DNA analogs. Fmoc-PNA-C(Boc)-OH can be used to prepare highly specific, enzyme-stable antisense probes and diagnostic probes.

HY-181455

rel-FTY720 phenoxy-biotin hydrochloride	Drug Derivative	Others
rel-FTY720 phenoxy-biotin hydrochloride is a chemical probe designed based on the structure of Fingolimod (HY-12005), which incorporates a phenoxy group capable of specific click chemistry reactions and is conjugated with a biotin tag .

HY-156583

Thiophosphoro alkyne dichloridate TPAC	Biochemical Assay Reagents	Others
Thiophosphoro alkyne dichloridate (TPAC) is a thio-phosphonyl dichloride reagent based on the biomimetic design of histidine phosphorylation. Thiophosphoro alkyne dichloridate can selectively covalently couple with histidine and can be used for the development of protein function probes .

HY-180485

PROTAC D16-M1P2	PROTACs Wee1 CDK	Cancer
PROTAC D16-M1P2 is an orally active PKMYT1 PROTAC degrader with a DC₅₀ of 0.7 nM. PROTAC D16-M1P2 also inhibits the activity of PKMYT1 with an IC₅₀ of 7.6 nM. PROTAC D16-M1P2 inhibits pCDK1 with an IC₅₀ of 9 nM. PROTAC D16-M1P2 has demonstrated significant anti-tumor efficacy in mouse models and can be used for research on breast cancer .

HY-D2951

BG-Kaede chromophore	Fluorescent Dye	Others
BG-Kaede chromophore (Compound 4c) is a SNAP-tag-specific fluorescent probe, which is designed and synthesized using the chromophore of the red fluorescent protein Kaede as a template. BG-Kaede chromophore can be used as a tool for visualizing proteins in living cells .

HY-D3346

Dusquench1 NHS ester	Fluorescent Dye	Others
Dusquench1 NHS ester is an amino-reactive fluorescent quencher (it does not emit light and has no emission wavelength, Ex = 480-580 nM), specially designed for labeling proteins, oligonucleotides and other biopolymers containing primary amines. It is a core reagent in the fields of qPCR probes, FRET detection and molecular beacons.

HY-113331F

Thromboxane B2-biotin	Biochemical Assay Reagents	Others
Thromboxane B2-biotin is an affinity probe that allows detection of thromboxane B2 through an interaction with the biotin ligand. Thromboxane B2-biotin is designed to allow thromboxane B2 to be detected in complexes with protein binding partners .

HY-W540123

Fmoc-PNA-A(Bhoc)-OH	Biochemical Assay Reagents	Cancer
Fmoc-PNA-A(Bhoc)-OH is a protected peptide nucleic acid (PNA) monomer carrying an adenine base. Fmoc-PNA-A(Bhoc)-OH contains Fmoc and benzhydryloxycarbonyl (Bhoc) protecting groups, and serves as a standard building block designed specifically for solid-phase PNA synthesis. Fmoc-PNA-A(Bhoc)-OH can be efficiently used to synthesize PNA-based sequence-specific hybridization probes. These probes have broad applications in molecular biology research; for example, they can be used in HER2-expressing tumor-related studies, providing tools for disease diagnosis and mechanism exploration .

HY-D2941

BGAF SNAP-AF	Fluorescent Dye	Others
BGAF (SNAP-AF) is a fluorescent diacetyl fluorescein-labeled SNAP tag fluorescent probe, specifically designed for the covalent labeling of SNAP-tag fusion proteins in living cells. BGAF utilizes the specific reaction of the human DNA repair protein hAGT to achieve specific fluorescent labeling of the target protein in the living cell environment .

HY-D3143

QM-B-CF	Fluorescent Dye	Cancer
QM-B-CF is a sequential dual-lock chemiluminescent/fluorescent dual-mode probe designed for the specific detection of H₂O₂, and it can produce enhanced chemiluminescence upon photoirradiation. QM-B-CF generates chemiluminescent signals only under the conditions of H₂O₂ and light exposure in vitro, in cancer cells, and in tumor-bearing nude mice (Ex/Em = 514 nm/600 nm) .

HY-D2939

BGSBD	Fluorescent Dye	Others
BGSBD is a SNAP-tag-based fluorescent probe (Ex/Em: 435 nm/516 nm) based on the environmentally sensitive fluorescent group SBD, specifically designed for protein labeling of live cells without washing. BGSBD achieves a 280-fold fluorescence enhancement after labeling by ingeniously utilizing the hydrophobic binding pocket of the SNAP-tag protein, providing an ideal tool for real-time monitoring of protein dynamics within cells .

HY-158616

4-Methyl-7-(2-nitrophenoxy)-2H-chromen-2-one	Fluorescent Dye	Others
4-Methyl-7-(2-nitrophenoxy)-2H-chromen-2-one (compound 2f) is a selenol fluorescent probe designed based on a nucleophilic aromatic substitution mechanism. It can selectively recognize selenols in neutral aqueous solution without significant interference from biological thiols, amines or alcohols. It can be used to quantify the selenium content in selenoenzymes and to image the activity of endogenous selenols in living cells.

HY-D2982

BTP9-Neu5Ac	Fluorescent Dye	Infection
BTP9-Neu5Ac is a fluorescent imaging probe specifically designed for detecting the neuraminidase (NA) sialidase activity of influenza viruses. BTP9-Neu5Ac can visualize the intracellular Golgi localization of the viral NA activity. BTP9-Neu5Ac can be used for precise and temporal monitoring of the key enzyme activities during the viral life cycle .

HY-D3224

HCP	Fluorescent Dye	Neurological Disease
HCP is a two-photon fluorescent probe capable of crossing the blood-brain barrier, which is specifically designed for real-time detection of hypochlorous acid (HClO/ClO ^-) produced by myeloperoxidase (MPO). Chlorination of the quinoline skeleton of HCP generates HCP-Cl, which eliminates intramolecular charge transfer (ICT) quenching and thereby produces fluorescence. HCP is suitable for in vivo dynamic imaging of HClO in the brains of epileptic mice and high-throughput screening of antiepileptic drugs (HCP-Cl: Ex/Em = 800 nm/495 nm) .

HY-P11688

Fmoc-PNA-M(Bhoc)-OH	Biochemical Assay Reagents	Others
Fmoc-PNA-M (Bhoc)-OH is a standard peptide nucleic acid (PNA) monomer building block. Fmoc-PNA-M (Bhoc)-OH carries two protecting groups, Fmoc and Bhoc, and is specifically designed for solid-phase and automated PNA synthesis. Fmoc-PNA-M (Bhoc)-OH efficiently participates in the construction of sequence-specific PNA probes. Through its protecting group strategy, Fmoc-PNA-M (Bhoc)-OH ensures the accuracy and efficiency of PNA synthesis, and is one of the important raw materials for PNA synthesis at present .

HY-D3007

LD-CK	Fluorescent Dye	Others
LD-CK is a fluorescent probe based on a coumarin-chromone structure, specifically designed to visualize lipid droplet polarity changes and endowed with multimodal imaging capability. LD-CK contains a high-performance lipophilic coumarin moiety, which enables it to specifically target lipid droplets upon cellular entry while minimizing background fluorescence to the greatest extent. LD-CK has an excitation wavelength (Ex) of 488 nm and an emission wavelength (Em) of 540 nm (in low-polarity environments such as toluene) or 640 nm (in high-polarity environments such as glycerol), with its emission peak undergoing a redshift as solvent polarity increases .

HY-D2924

CBG-549-QSY7	Fluorescent Dye	Others
CBG-549-QSY7 is a Dylight 549-labeled SNAP tag fluorescent probe (Ex/Em: 546 nm/580 nm), specially designed for non-washable fluorescence imaging applications. CBG-549-QSY7 employs an intramolecular FRET quenching mechanism: intramolecular fluorescence quenching occurs before binding to the SNAP tag, and upon binding, the quenching group is cleaved, releasing fluorescence. The background fluorescence of CBG-549-QSY7 is extremely low, and clear cell membrane images can be obtained after 5 minutes of incubation .

Cat. No.	Product Name

HY-L198

Non-natural Amino Acid Compound Library	134 compounds
Unlike the 20 natural amino acids commonly found within living organisms, non-natural amino acids are synthesized through chemical or biosynthetic methods, thereby being endowed with unique chemical properties or biological activities. In drug development, these amino acids can be utilized to design novel pharmaceutical molecules that may exhibit superior pharmacological characteristics, such as increased selectivity, improved pharmacokinetic profiles, or reduced toxicity. In biomedical research, uon-natural amino acids can act as biological markers or probes for investigating biological processes like cell signaling, protein conformation, and protein-protein interactions. In addition, non-natural amino acids can also be used in the field of agriculture to develop new pesticides, plant growth regulators and so on.

Non-natural Amino Acid Compound Library

134 compounds

Unlike the 20 natural amino acids commonly found within living organisms, non-natural amino acids are synthesized through chemical or biosynthetic methods, thereby being endowed with unique chemical properties or biological activities. In drug development, these amino acids can be utilized to design novel pharmaceutical molecules that may exhibit superior pharmacological characteristics, such as increased selectivity, improved pharmacokinetic profiles, or reduced toxicity. In biomedical research, uon-natural amino acids can act as biological markers or probes for investigating biological processes like cell signaling, protein conformation, and protein-protein interactions. In addition, non-natural amino acids can also be used in the field of agriculture to develop new pesticides, plant growth regulators and so on.

HY-L903

3D Diverse Fragment Library	5,278 compounds
Fragment-based drug discovery (FBDD) is well suited for discovering both drug leads and chemical probes of protein function. 3-dimensionality (3D) diversity is pivotal because the molecular shape is one of the most important factors in molecular recognition by a biomolecule. There is a developing appreciation that 3D fragments could offer opportunities that are not provided by 2D fragments. MCE 3D Diverse Fragment Library consists of 5,400 non-flat fragment-like molecules (average Fsp3 value 0.58). More than 4,700 fragment compounds contain at least one chiral center in the structure. The key concepts that underlie the library design were 3D shape, structural diversity, reactive functionality and fragment-like. This 3D Diverse Fragment Library brings higher fragment hit optimization and increases the likelihood to find innovative hits in FBDD.

3D Diverse Fragment Library

5,278 compounds

Fragment-based drug discovery (FBDD) is well suited for discovering both drug leads and chemical probes of protein function. 3-dimensionality (3D) diversity is pivotal because the molecular shape is one of the most important factors in molecular recognition by a biomolecule. There is a developing appreciation that 3D fragments could offer opportunities that are not provided by 2D fragments.

MCE 3D Diverse Fragment Library consists of 5,400 non-flat fragment-like molecules (average Fsp3 value 0.58). More than 4,700 fragment compounds contain at least one chiral center in the structure. The key concepts that underlie the library design were 3D shape, structural diversity, reactive functionality and fragment-like. This 3D Diverse Fragment Library brings higher fragment hit optimization and increases the likelihood to find innovative hits in FBDD.

HY-L937

Unnatural Amino Acids Fragment library	931 compounds
Unnatural amino acids (UAAs), also referred to as non-canonical amino acids (ncAAs) or non-proteinogenic amino acids, are a class of amino acids that are distinct from the 20 standard natural amino acids. They can be obtained through chemical synthesis, biosynthesis, and other approaches, with structural diversity far exceeding that of natural amino acids. UAAs are mainly including naturally occurring non-canonical amino acids, chemically synthesized amino acids, and biosynthetic amino acids, which provide a molecular basis for protein function design. UAAs exhibit significant value in multiple fields. They can optimize the pharmacokinetic properties of peptide drugs and peptidomimetics, modify enzyme functions and endow them with new biological activities, thereby overcoming the limitations of traditional peptide drugs and expanding the chemical space . Meanwhile, UAAs can serve as molecular probes to analyze protein-protein interactions and investigate the regulatory mechanisms of protein functions. MCE has compiled a UAAs Fragment Library comprising nearly a thousand unnatural amino acid fragments with extensive coverage of chemical space and enhanced structural diversity. This compound library can be widely applied in peptide synthesis, drug design, and protein engineering.

Unnatural Amino Acids Fragment library

931 compounds

Unnatural amino acids (UAAs), also referred to as non-canonical amino acids (ncAAs) or non-proteinogenic amino acids, are a class of amino acids that are distinct from the 20 standard natural amino acids. They can be obtained through chemical synthesis, biosynthesis, and other approaches, with structural diversity far exceeding that of natural amino acids. UAAs are mainly including naturally occurring non-canonical amino acids, chemically synthesized amino acids, and biosynthetic amino acids, which provide a molecular basis for protein function design.

UAAs exhibit significant value in multiple fields. They can optimize the pharmacokinetic properties of peptide drugs and peptidomimetics, modify enzyme functions and endow them with new biological activities, thereby overcoming the limitations of traditional peptide drugs and expanding the chemical space . Meanwhile, UAAs can serve as molecular probes to analyze protein-protein interactions and investigate the regulatory mechanisms of protein functions.

MCE has compiled a UAAs Fragment Library comprising nearly a thousand unnatural amino acid fragments with extensive coverage of chemical space and enhanced structural diversity. This compound library can be widely applied in peptide synthesis, drug design, and protein engineering.

HY-L918

Molecular Glue-like Compound Library	317 compounds
Targeted Protein Degradation (TPD) is a novel and promising approach to drug development. It shows great potential for targeting proteins traditionally considered "undruggable" due to the lack of enzymatic function and absence of binding sites by tagging them for degradation or recruiting natural degradation mechanisms. Molecular glues are a type of small-molecule degraders that primarily induce novel interactions between E3 ubiquitin ligases and target proteins, forming ternary complexes that lead to protein ubiquitination and subsequent proteasomal degradation. Compared with PROTACs, molecular glues generally have lower molecular weights, higher cell permeability, and better drug-like properties. Additionally, the design of molecular glues is relatively simple, without the requirements for complex linkers and ligand optimization. As a result, molecular glues have gradually emerged as a promising therapeutic approach for various diseases. Multiple types of molecular glues have been reported previously. Analysis of co-crystal complex structures reveals that CRBN-related molecular glues are more versatile. Therefore, MCE researchers select active molecules related to these targets as probes for artificial intelligence (AI) screening.Subsequently, molecular docking technology was used to verify whether the screened molecules retained the key pharmacophore features. Ultimately, we obtained 317 molecular glue analogs, and these compounds serve as powerful tools for the research of molecular glues.

Molecular Glue-like Compound Library

317 compounds

Targeted Protein Degradation (TPD) is a novel and promising approach to drug development. It shows great potential for targeting proteins traditionally considered "undruggable" due to the lack of enzymatic function and absence of binding sites by tagging them for degradation or recruiting natural degradation mechanisms.

Molecular glues are a type of small-molecule degraders that primarily induce novel interactions between E3 ubiquitin ligases and target proteins, forming ternary complexes that lead to protein ubiquitination and subsequent proteasomal degradation. Compared with PROTACs, molecular glues generally have lower molecular weights, higher cell permeability, and better drug-like properties. Additionally, the design of molecular glues is relatively simple, without the requirements for complex linkers and ligand optimization. As a result, molecular glues have gradually emerged as a promising therapeutic approach for various diseases.

Multiple types of molecular glues have been reported previously. Analysis of co-crystal complex structures reveals that CRBN-related molecular glues are more versatile. Therefore, MCE researchers select active molecules related to these targets as probes for artificial intelligence (AI) screening.Subsequently, molecular docking technology was used to verify whether the screened molecules retained the key pharmacophore features. Ultimately, we obtained 317 molecular glue analogs, and these compounds serve as powerful tools for the research of molecular glues.

Cat. No.	Product Name	Type

HY-D1041

ICG NHS ester ICG-OSu	Fluorescent Dye
ICG NHS ester (ICG-OSu) is a near-infrared fluorescent agent ICG derivative. ICG NHS ester is amine-reactive and has been widely used to design in vivo imaging probes .

HY-DY1072

ICG NHS ester (solution) ICG-OSu (solution)	Fluorescent Dye
ICG NHS ester (ICG-OSu) (solution) is a near-infrared fluorescent agent ICG derivative. ICG NHS ester is amine-reactive and has been widely used to design in vivo imaging probes . Solvent and concentration: DMSO: 10 mM

HY-D2324

EE-Flipper 33	Fluorescent Dye
EE-Flipper 33 is a Flipper probe designed to evaluate the mechanism of early endocytosis. EE-Flipper has a pKa value of 10.6 and is capable of tracking approximately 70% of early endosomes (EE) in live cells. Furthermore, EE-Flipper 33 can also label the Golgi apparatus in live cells with an internal pH ranging from 6.0 to 6.7 .

HY-D2931

SNAP-FAM	Fluorescent Dye
SNAP-FAM is a FAM-labeled SNAP tag fluorescent probe, specifically designed for live-cell protein labeling and real-time imaging applications .

HY-D2949

SNAP-549	Fluorescent Dye
SNAP-549 is a DY-549P1-labeled SNAP tag fluorescent probe, specifically designed for single-molecule imaging and dynamic tracking of proteins in living cells. SNAP-549 only labels SNAP-tag fusion proteins, with low background signals and forming irreversible connections, making it suitable for long-term observation .

HY-D2954

BC-PEG-NH2 CLIP-PEG-NH2	Fluorescent Dye
BC-PEG-NH2 (CLIP-PEG-NH2) is a chemical building block specifically designed for the CLIP-tag system, featuring enhanced water solubility and reactivity. BC-PEG-NH2 can be used for the synthesis of super-resolution imaging probes .

HY-D2968

DCM–ONOO

Fluorescent Dye

DCM-ONOO is a near-infrared two-photon fluorescence probe specifically designed for real-time monitoring of the dynamic fluctuations of peroxynitrite (ONOO⁻) in epilepsy models. DCM-ONOO exhibits excellent optical properties, with a single photon excitation (Ex) of 520 nm; a single photon emission (Em) of 685 nm; a two-photon excitation of 820 nm; and a Stokes shift of 165 nm. When DCM-ONOO is combined with ONOO⁻, it shifts from 460 nm to 512 nm, and only generates a significant fluorescence response to ONOO⁻. DCM-ONOO has been successfully applied to rat epilepsy models .

HY-D3003

M-H2S

Fluorescent Dye

M-H2S is an endoplasmic reticulum-targeted ratio-type near-infrared fluorescent probe (Ex/Em : 480 nm/560 nm) specifically designed for the detection of hydrogen sulfide (H2S) in living cells and zebrafish. M-H2S exhibits detection limit for H2S of 39.1 nM, and the fluorescence intensity ratio (F₆₅₀/F₅₆₀) within the range of 0-40 μM shows a linear relationship with the H2S concentration. M-H2S responds best under pH = 7.2 (the normal physiological pH of the endoplasmic reticulum) conditions, making it suitable for the detection of the microenvironment of the endoplasmic reticulum. M-H2S can be used to study the role of H2S in endoplasmic reticulum function, stress response, and related diseases .

HY-D3141

DR probe

Fluorescent Dye

DR probe is a "dual-key-and-lock" fluorescent probe designed based on the Resorufin (HY-123533) scaffold (Ex/Em = 647 nm/663-738 nm). DR probe can be sequentially activated by hydrogen peroxide to form the intermediate SR, which acts as a tyrosinase substrate to trigger a fluorescence turn-on signal. DR probe can distinguish normal melanocytes from melanoma cells. DR probe supports cell imaging and can be applied to mouse melanoma models to achieve melanoma diagnosis with higher accuracy and lower false-positive rates. DR probe is applicable to relevant research on melanoma .

HY-D2951

BG-Kaede chromophore	Fluorescent Dye
BG-Kaede chromophore (Compound 4c) is a SNAP-tag-specific fluorescent probe, which is designed and synthesized using the chromophore of the red fluorescent protein Kaede as a template. BG-Kaede chromophore can be used as a tool for visualizing proteins in living cells .

HY-D3346

Dusquench1 NHS ester	Fluorescent Dye
Dusquench1 NHS ester is an amino-reactive fluorescent quencher (it does not emit light and has no emission wavelength, Ex = 480-580 nM), specially designed for labeling proteins, oligonucleotides and other biopolymers containing primary amines. It is a core reagent in the fields of qPCR probes, FRET detection and molecular beacons.

HY-D2941

BGAF SNAP-AF	Fluorescent Dye
BGAF (SNAP-AF) is a fluorescent diacetyl fluorescein-labeled SNAP tag fluorescent probe, specifically designed for the covalent labeling of SNAP-tag fusion proteins in living cells. BGAF utilizes the specific reaction of the human DNA repair protein hAGT to achieve specific fluorescent labeling of the target protein in the living cell environment .

HY-D3143

QM-B-CF	Fluorescent Dye
QM-B-CF is a sequential dual-lock chemiluminescent/fluorescent dual-mode probe designed for the specific detection of H₂O₂, and it can produce enhanced chemiluminescence upon photoirradiation. QM-B-CF generates chemiluminescent signals only under the conditions of H₂O₂ and light exposure in vitro, in cancer cells, and in tumor-bearing nude mice (Ex/Em = 514 nm/600 nm) .

HY-D2939

BGSBD

Fluorescent Dye

BGSBD is a SNAP-tag-based fluorescent probe (Ex/Em: 435 nm/516 nm) based on the environmentally sensitive fluorescent group SBD, specifically designed for protein labeling of live cells without washing. BGSBD achieves a 280-fold fluorescence enhancement after labeling by ingeniously utilizing the hydrophobic binding pocket of the SNAP-tag protein, providing an ideal tool for real-time monitoring of protein dynamics within cells .

HY-158616

4-Methyl-7-(2-nitrophenoxy)-2H-chromen-2-one

Fluorescent Dye

4-Methyl-7-(2-nitrophenoxy)-2H-chromen-2-one (compound 2f) is a selenol fluorescent probe designed based on a nucleophilic aromatic substitution mechanism. It can selectively recognize selenols in neutral aqueous solution without significant interference from biological thiols, amines or alcohols. It can be used to quantify the selenium content in selenoenzymes and to image the activity of endogenous selenols in living cells.

HY-D2982

BTP9-Neu5Ac	Fluorescent Dye
BTP9-Neu5Ac is a fluorescent imaging probe specifically designed for detecting the neuraminidase (NA) sialidase activity of influenza viruses. BTP9-Neu5Ac can visualize the intracellular Golgi localization of the viral NA activity. BTP9-Neu5Ac can be used for precise and temporal monitoring of the key enzyme activities during the viral life cycle .

HY-D3224

HCP

Fluorescent Dye

HCP is a two-photon fluorescent probe capable of crossing the blood-brain barrier, which is specifically designed for real-time detection of hypochlorous acid (HClO/ClO ^-) produced by myeloperoxidase (MPO). Chlorination of the quinoline skeleton of HCP generates HCP-Cl, which eliminates intramolecular charge transfer (ICT) quenching and thereby produces fluorescence. HCP is suitable for in vivo dynamic imaging of HClO in the brains of epileptic mice and high-throughput screening of antiepileptic drugs (HCP-Cl: Ex/Em = 800 nm/495 nm) .

HY-D3007

LD-CK

Fluorescent Dye

LD-CK is a fluorescent probe based on a coumarin-chromone structure, specifically designed to visualize lipid droplet polarity changes and endowed with multimodal imaging capability. LD-CK contains a high-performance lipophilic coumarin moiety, which enables it to specifically target lipid droplets upon cellular entry while minimizing background fluorescence to the greatest extent. LD-CK has an excitation wavelength (Ex) of 488 nm and an emission wavelength (Em) of 540 nm (in low-polarity environments such as toluene) or 640 nm (in high-polarity environments such as glycerol), with its emission peak undergoing a redshift as solvent polarity increases .

HY-D2924

CBG-549-QSY7

Fluorescent Dye

CBG-549-QSY7 is a Dylight 549-labeled SNAP tag fluorescent probe (Ex/Em: 546 nm/580 nm), specially designed for non-washable fluorescence imaging applications. CBG-549-QSY7 employs an intramolecular FRET quenching mechanism: intramolecular fluorescence quenching occurs before binding to the SNAP tag, and upon binding, the quenching group is cleaved, releasing fluorescence. The background fluorescence of CBG-549-QSY7 is extremely low, and clear cell membrane images can be obtained after 5 minutes of incubation .

Cat. No.	Product Name	Type

HY-W127832

Ru(dpp)3(PF6)2

1 Publications Verification

Biochemical Assay Reagents

Ru(dpp)3(PF6)2 is a complex containing metallic ruthenium (Ru) and is a chemiluminescent oxygen probe. [Ru(dpp)3] ²⁺ is a luminescent substance that can undergo metal-to-ligand charge transfer (MLCT), and fluorescence will appear during the transfer of Ru to the ligand. At the same time, the fluorescence of Ru(dpp)3(PF6)2 is effectively quenched by molecular oxygen, so it is widely used in biosensors, environmental monitoring, and materials science. The property of Ru(dpp)3(PF6)2, which oxidizes Ru ²⁺ to Ru ³⁺, has also been used to design and construct solid-state light-emitting electrochemical cells .

Cat. No.	Product Name	Target	Research Area

HY-P11684

Fmoc-PNA-C(Boc)-OH	DNA/RNA Synthesis	Others
Fmoc-PNA-C(Boc)-OH is a protected peptide nucleic acid (PNA) monomer for solid-phase synthesis. Fmoc-PNA-C(Boc)-OH possesses Fmoc-protected skeletal amino groups and Boc-protected cytosine bases, designed to construct stable synthetic DNA analogs. Fmoc-PNA-C(Boc)-OH can be used to prepare highly specific, enzyme-stable antisense probes and diagnostic probes.

HY-W540123

Fmoc-PNA-A(Bhoc)-OH	Biochemical Assay Reagents	Cancer
Fmoc-PNA-A(Bhoc)-OH is a protected peptide nucleic acid (PNA) monomer carrying an adenine base. Fmoc-PNA-A(Bhoc)-OH contains Fmoc and benzhydryloxycarbonyl (Bhoc) protecting groups, and serves as a standard building block designed specifically for solid-phase PNA synthesis. Fmoc-PNA-A(Bhoc)-OH can be efficiently used to synthesize PNA-based sequence-specific hybridization probes. These probes have broad applications in molecular biology research; for example, they can be used in HER2-expressing tumor-related studies, providing tools for disease diagnosis and mechanism exploration .

HY-P11688

Fmoc-PNA-M(Bhoc)-OH	Biochemical Assay Reagents	Others
Fmoc-PNA-M (Bhoc)-OH is a standard peptide nucleic acid (PNA) monomer building block. Fmoc-PNA-M (Bhoc)-OH carries two protecting groups, Fmoc and Bhoc, and is specifically designed for solid-phase and automated PNA synthesis. Fmoc-PNA-M (Bhoc)-OH efficiently participates in the construction of sequence-specific PNA probes. Through its protecting group strategy, Fmoc-PNA-M (Bhoc)-OH ensures the accuracy and efficiency of PNA synthesis, and is one of the important raw materials for PNA synthesis at present .

Cat. No.	Product Name		Classification

HY-156583

Thiophosphoro alkyne dichloridate TPAC		Alkynes
Thiophosphoro alkyne dichloridate (TPAC) is a thio-phosphonyl dichloride reagent based on the biomimetic design of histidine phosphorylation. Thiophosphoro alkyne dichloridate can selectively covalently couple with histidine and can be used for the development of protein function probes .

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