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Results for "

aromatic amino acid

" in MedChemExpress (MCE) Product Catalog:

By Targets:	5-HT Receptor (3) Amyloid-β (5) Angiotensin-converting Enzyme (ACE) (1) Antibiotic (1) Apoptosis (8) Aryl Hydrocarbon Receptor (1) Autophagy (17) Bacterial (3) Biochemical Assay Reagents (2) Carboxypeptidase (1) Cytochrome P450 (1) DNA/RNA Synthesis (1) Drug Derivative (3) Drug Intermediate (2) Drug Metabolite (11) Endogenous Metabolite (29) Environmental Pollutants (2) ERK (5) Fluorescent Dye (6) GABA Receptor (1) Glycosidase (1) Isotope-Labeled Compounds (19) Liposome (3) Monoamine Oxidase (1) Necroptosis (8) NF-κB (1) NO Synthase (1) Photosensitizer (1) Pyruvate Kinase (4) Reference Standards (12) Ser/Thr Protease (2) SOD (1) Trk Receptor (1) Tryptophan Hydroxylase (1) Tyrosine Hydroxylase (1)
By Research Areas:	Cancer (17) Cardiovascular Disease (2) Infection (7) Inflammation/Immunology (3) Metabolic Disease (21) Neurological Disease (41)
Click Chemistry:	Labeling and Fluorescence Imaging (1) Azide (1)
Oligonucleotides:	Pegylated Lipids (3)

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5-Hydroxytryptophan 2 Publications Verification 5-HTP; DL-5-Hydroxytryptophan	Endogenous Metabolite 5-HT Receptor	Neurological Disease Metabolic Disease
5-Hydroxytryptophan, a tryptophan metabolite, is a direct 5-hydroxytryptamine (5-HT) precursor and an L-aromatic amino acid decarboxylase substrate. .

Dansyl chloride DNSCl	Fluorescent Dye	Others
Dansyl chloride is a reagent that produces stable blue or blue-green fluorescent sulfonamide adducts in the reaction of aliphatic and aromatic amines with primary amino groups, and is widely used for modified amino acids, protein sequencing and amino acid analysis .

Homovanillic acid Vanilacetic acid	Drug Metabolite Endogenous Metabolite Autophagy	Metabolic Disease
Homovanillic acid (Vanilacetic acid) is a dopamine metabolite found to be associated with aromatic L-amino acid decarboxylase deficiency, celiac disease, growth hormone deficiency, and sepiapterin reductase deficiency .

Benserazide hydrochloride Maximum Cited Publications 7 Publications Verification Ro 4-4602 hydrochloride	Pyruvate Kinase	Neurological Disease Cancer
Benserazide hydrochloride (Serazide) is an aromatic L-amino acid decarboxylase (AADC) and L-DOPA decarboxylase inhibitor. Benserazide hydrochloride is also a PKM2 inhibitor. Benserazide hydrochloride directly binds to and blocks PKM2 enzyme activity, leading to inhibition of aerobic glycolysis concurrent up-regulation of OXPHOS. Benserazide hydrochloride can be used for the study of Parkinson's disease and melanoma .

Shikimic acid 3 Publications Verification	Endogenous Metabolite	Others
Shikimic acid is a key metabolic intermediate of the aromatic amino acid biosynthesis pathway, found in microbes and plants.

Tetrahydrobiopterin 3 Publications Verification (Rac)-Sapropterin	NO Synthase Endogenous Metabolite	Inflammation/Immunology
Tetrahydrobiopterin ((Rac)-Sapropterin) is a cofactor of the aromatic amino acid hydroxylases enzymes and also acts as an essential cofactor for all nitric oxide synthase (NOS) isoforms.

Pyridoxal 5'-phosphate monohydrate 4 Publications Verification Pyridoxal phosphate monohydrate	Endogenous Metabolite Amyloid-β ERK	Neurological Disease Metabolic Disease Cancer
Pyridoxal 5'-phosphate monohydrate, the active form of vitamin B6, is an essential cofactor for multiple enzymes, including aromatic l-amino acid decarboxylase that catalyzes the final stage in the production of the neurotransmitters dopamine and serotonin. Pyridoxal 5'-phosphate monohydrate is the most important coenzyme variant in the process of vitamin B6 intracellular phosphorylation and is interconvertible with other variants, including pyridoxine 5′‐phosphate (PNP) and pyridoxamine 5′‐phosphate (PMP) .

Glyphosate 1 Publications Verification	Environmental Pollutants Necroptosis Apoptosis Autophagy	Neurological Disease
Glyphosate, a non-selective systemic biocide with broad-spectrum activity, is an herbicidal derivative of the amino acid glycine. Glyphosate inhibits the enzymatic activity of the 5-endopyruvylshikimate 3-phosphate synthase (EPSPS) in the shikimic acid pathway, preventing the synthesis of the aromatic amino acids tyrosine, phenylalanine, and tryptophan. Glyphosate induces oxidative stress, neuroinflammation, and mitochondrial dysfunction, processes that lead to neuronal death by autophagia, necrosis, or apoptosis, as well as the appearance of behavioral and motor disorders .

TLCK-treated Chymotrypsin 1 Publications Verification	Ser/Thr Protease	Others
TLCK-treated Chymotrypsin is a serine protease. Chymotrypsin cleaves protein chains at the carboxyl side of aromatic amino acids. TLCK treated to inactivate residual tryspin activity .

DSPE-PEG1000-Amine ammonium DSPE-PEG1000-NH2 ammonium	Liposome	Cancer
DSPE-PEG1000-Amine (DSPE-PEG1000-NH2) ammonium is a 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-polyethylene glycol conjugate with a terminal amino group. DSPE-PEG1000-Amine ammonium can functionalize the surface of PLGA-lecithin-PEG core-shell nanoparticles to introduce positive surface charges. The amino group of DSPE-PEG1000-Amine ammonium can be converted into an aromatic aldehyde to react with the acetone-protected aromatic hydrazide on the surface of bovine carbonic anhydrase (BCA) molecules .

Benserazide Maximum Cited Publications 7 Publications Verification Ro 4-4602	Pyruvate Kinase	Neurological Disease Cancer
Benserazide is an aromatic L-amino acid decarboxylase (AADC) and L-DOPA decarboxylase inhibitor. Benserazide is also a PKM2 inhibitor. Benserazide directly binds to and blocks PKM2 enzyme activity, leading to inhibition of aerobic glycolysis concurrent up-regulation of OXPHOS. Benserazide can be used for the study of Parkinson's disease and melanoma .

Pyridoxal Phosphate-d3 Pyridoxal 5'-phosphate-d₃	Endogenous Metabolite Amyloid-β ERK	Neurological Disease Metabolic Disease Cancer
Pyridoxal Phosphate-d₃ is the deuterium labeled Pyridoxal 5'-phosphate. Pyridoxal 5'-phosphate, the active form of vitamin B6, is an essential cofactor for multiple enzymes, including aromatic l-amino acid decarboxylase that catalyzes the final stage in the production of the neurotransmitters dopamine and serotonin. Pyridoxal 5'-phosphate is the most important coenzyme variant in the process of vitamin B6 intracellular phosphorylation and is interconvertible with other variants, including pyridoxine 5′‐phosphate (PNP) and pyridoxamine 5′-phosphate (PMP) .

4-Chloro-L-phenylalanine L-PCPA	5-HT Receptor Tryptophan Hydroxylase	Neurological Disease
4-Chloro-L-phenylalanine (L-PCPA) is a tryptophan hydroxylase inhibitor targeting TPH1 and TPH2, with the activity of blocking serotonin biosynthesis. 4-Chloro-L-phenylalanine reduces the levels of serotonin and its metabolites in the brain without impairing the survival of serotonergic neurons. 4-Chloro-L-phenylalanine enhances anhedonic, depression-like and anxiety-like behaviors in mice with depleted noradrenergic and dopaminergic neurons. 4-Chloro-L-phenylalanine acts as a decarboxylation substrate for aromatic L-amino acid decarboxylase from Bacillus atrophaeus. 4-Chloro-L-phenylalanine can be used in studies related to Parkinson's disease .

4-Hydroxyphenylpyruvic acid 1 Publications Verification	Endogenous Metabolite	Cardiovascular Disease Metabolic Disease
4-Hydroxyphenylpyruvic acid is an intermediate in the metabolism of the amino acid phenylalanine. 4-Hydroxyphenylpyruvic acid is a substrate of 4-hydroxyphenylpyruvic acid dioxygenase (HPPA). 4-Hydroxyphenylpyruvic acid can be used in the study of HPD-related diseases, such as type III tyrosinemia and hawkinsinuria .

Pyridoxal 5'-phosphate hydrate 4 Publications Verification Pyridoxal phosphate hydrate	Endogenous Metabolite Amyloid-β ERK	Neurological Disease Metabolic Disease Cancer
Pyridoxal 5'-phosphate hydrate, the active form of vitamin B6, is an essential cofactor for multiple enzymes, including aromatic l-amino acid decarboxylase that catalyzes the final stage in the production of the neurotransmitters dopamine and serotonin. Pyridoxal 5'-phosphate hydrate is the most important coenzyme variant in the process of vitamin B6 intracellular phosphorylation and is interconvertible with other variants, including pyridoxine 5′‐phosphate (PNP) and pyridoxamine 5′-phosphate (PMP) .

7-Azido-4-methylcoumarin 1 Publications Verification	Fluorescent Dye	Others
7-Azido-4-methylcoumarin is a selective coumarin-based fluorescent probe for hydrogen sulfide (H₂S). In the presence of H₂S, the aromatic azido group of 7-Azido-4-methylcoumarin is selectively reduced to produce the fluorescently active 7-amino-4-methylcoumarin (AMC). 7-Azido-4-methylcoumarin binds to the coumarin/phenol-binding site of BSA, the aglycone-binding site of UGT1A6, and the substrate-binding site of SULT1A1, respectively. 7-Azido-4-methylcoumarin retains its fluorescent properties after covalent binding, acts as a fluorescent H₂S probe, and does not react with cysteine, homocysteine or glutathione (Ex/Em = 340/445 nm) .

3-O-Methyl-DL-DOPA 3-Methoxytyrosine	Endogenous Metabolite	Neurological Disease
3-O-Methyl-DL-DOPA is an endogenous metabolite present in Cerebrospinal_Fluid that can be used for the research of Epilepsy, Purine Nucleoside Phosphorylase Deficiency and Aromatic L Amino Acid Decarboxylase Deficiency .

Glyphosate (Standard)	Reference Standards Apoptosis Autophagy Necroptosis	Cancer
Glyphosate (Standard) is the analytical standard of Glyphosate. This product is intended for research and analytical applications. Glyphosate is an herbicidal derivative of the amino acid glycine. Glyphosate targets and blocks a plant metabolic pathway not found in animals, the shikimate pathway, required for the synthesis of aromatic amino acids in plants .

Foscarbidopa ABBV-951; Carbidopa 4′-monophosphate	Aryl Hydrocarbon Receptor Drug Metabolite	Neurological Disease
Foscarbidopa (ABBV-951; Carbidopa 4′-monophosphate) is an inhibitory prodrug targeting peripheral aromatic L-amino acid decarboxylase. Foscarbidopa is hydrolyzed into Carbidopa (HY-B0311) by phosphatases in vivo to suppress peripheral metabolism of levodopa and elevate brain delivery of levodopa. Foscarbidopa can be used for the research of Parkinson’s disease and advanced Parkinson’s disease .

DL-Tyrosine	Drug Derivative	Infection Neurological Disease
DL-Tyrosine is an aromatic nonessential amino acid synthesized from the essential amino acid phenylalanine. DL-Tyrosine is a precursor for several important neurotransmitters (epinephrine, norepinephrine, dopamine) .

Dansyl chloride-d6 DNSCl-d₆	Biochemical Assay Reagents	Others
Dansyl chloride-d₆ is the deuterium labeled Dansyl chloride (HY-D0017). Dansyl chloride is a reagent that produces stable blue or blue-green fluorescent sulfonamide adducts in the reaction of aliphatic and aromatic amines with primary amino groups, and is widely used for modified amino acids, protein sequencing and amino acid analysis .

Glyphosate-13C2,15N	Isotope-Labeled Compounds Apoptosis Autophagy Necroptosis	Neurological Disease
Glyphosate- ¹³C₂, ¹⁵N is the ¹³C and ¹⁵N labled Glyphosate (HY-B0863). Glyphosate is an herbicidal derivative of the amino acid glycine. Glyphosate targets and blocks a plant metabolic pathway not found in animals, the shikimate pathway, required for the synthesis of aromatic amino acids in plants .

Homovanillic acid-d5 Vanilacetic acid-d₅	Isotope-Labeled Compounds Autophagy Endogenous Metabolite Drug Metabolite	Neurological Disease Metabolic Disease
Homovanillic acid-d₅ (Vanilacetic acid-d₅) is the deuterium labeled Homovanillic acid (HY-N0384). Homovanillic acid (Vanilacetic acid) is a dopamine metabolite found to be associated with aromatic L-amino acid decarboxylase deficiency, celiac disease, growth hormone deficiency, and sepiapterin reductase deficiency .

H-Pro-Phe-OH Pro-Phe	Angiotensin-converting Enzyme (ACE)	Cardiovascular Disease
H-Pro-Phe-OH is a dipeptide containing proline and phenylalanine, which can serve as a substrate for prolinase. H-Pro-Phe-OH can also be used for polypeptide synthesis, where phenylalanine is an aromatic amino acid that can inhibit the activity of Angiotensin-converting enzyme (ACE, HY-P2983) .

4-Benzoylbenzoic acid Benzoylbenzoicacid	Bacterial Antibiotic Photosensitizer	Infection
4-(Phenylcarbonyl)benzoic acid is a photooxidant. Upon light activation, 4-(Phenylcarbonyl)benzoic acid forms an electrophilic aromatic ketone that acts as an oxidant in organic synthesis or biological systems. 4-(Phenylcarbonyl)benzoic acid has been used in the study of amino acid oxidation, as well as the synthesis of photoactivated antibacterial and antiviral compounds ¹ ² ³.

Glyphosate-13C	Isotope-Labeled Compounds Apoptosis Autophagy Necroptosis	Neurological Disease
Glyphosate- ¹³C is the ¹³C-labeled Glyphosate (HY-B0863). Glyphosate, a non-selective systemic biocide with broad-spectrum activity, is an herbicidal derivative of the amino acid glycine. Glyphosate inhibits the enzymatic activity of the 5-endopyruvylshikimate 3-phosphate synthase (EPSPS) in the shikimic acid pathway, preventing the synthesis of the aromatic amino acids tyrosine, phenylalanine, and tryptophan. Glyphosate induces oxidative stress, neuroinflammation, and mitochondrial dysfunction, processes that lead to neuronal death by autophagia, necrosis, or apoptosis, as well as the appearance of behavioral and motor disorders .

4-Bromo-3-hydroxybenzoic acid	Endogenous Metabolite	Neurological Disease
4-Bromo-3-hydroxybenzoic acid is a metabolite of Brocresine and a histidine decarboxylase (HDC) inhibitor with IC₅₀s of 1 mM for both rat fetal and rat gastric HDC. 4-Bromo-3-hydroxybenzoic acid also inhibits aromatic-L-amino acid decarboxylase from hog kidney and rat gastric mucosa in vitro with IC₅₀s of 1 mM for both enzymes .

Ponceau 4R (85%) acid Red 18 (85%); New Coccine (85%)	Environmental Pollutants Drug Derivative	Neurological Disease Inflammation/Immunology
Ponceau 4R (85%) (Acid Red 18 (85%); New Coccine (85%)) is an orally active synthetic food colorant and a HSA-binding aggregator. Ponceau 4R (85%) binds to HSA, inducing its partial unfolding, conformational changes and aggregation. Ponceau 4R (85%) serves as a food colorant and can be used in research on diseases including type Ⅱ diabetes, Parkinson's disease, Huntington's disease and spongiform encephalopathy .

Recombinant Proteinase K	Ser/Thr Protease	Others
Recombinant Proteinase K is a serine protease that cleaves the carboxy-terminated peptide bonds of aliphatic and aromatic amino acids. Recombinant Proteinase K can be used to digest proteins and remove contamination from nucleic acid preparations .

Lecanoric acid	Others	Infection
Lecanoric acid is a histidine-decarboxylase inhibitor isolated from fungus. The inhibition by lecanoric acid is competitive with histidineand noncompetitive with pyridoxal phosphate. Lecanoric acid did not inhibit aromatic amino acid decarboxylase .

Chorismic acid	DNA/RNA Synthesis Drug Intermediate Endogenous Metabolite Bacterial	Infection
Chorismic acid is a precursor for the biosynthesis of aromatic amino acids and vitamins, as well as a key metabolite in tRNA modification. Chorismic acid is a critical metabolite for the synthesis of cmo ⁵U. Deficiency of Chorismic acid inhibits the formation of cmo ⁵U and mcmo ⁵U. Chorismic acid can be used in studies of S. typhimurium and E. coli infections .\n

Shikimic acid (Standard)	Reference Standards Endogenous Metabolite	Others
Shikimic acid (Standard) is the analytical standard of Shikimic acid. This product is intended for research and analytical applications. Shikimic acid is a key metabolic intermediate of the aromatic amino acid biosynthesis pathway, found in microbes and plants.

Carboxypeptidase C Carboxypeptidase Y; EC 3.4.16.1	Carboxypeptidase	Others
Carboxypeptidase C is a carboxypeptidase, is often used in biochemical studies. Carboxypeptidase C removes COOH-terminal lysine, arginine, and proline, as well as all other neutral, aliphatic, aromatic, and the acidic protein amino acids of a peptide chain .

Homovanillic acid (Standard) Vanilacetic acid (Standard)	Reference Standards Autophagy Endogenous Metabolite Drug Metabolite	Neurological Disease Metabolic Disease
Homovanillic acid (Standard) (Vanilacetic acid (Standard)) is the analytical standard of Homovanillic acid (HY-N0384). This product is intended for research and analytical applications. Homovanillic acid (Vanilacetic acid) is a dopamine metabolite found to be associated with aromatic L-amino acid decarboxylase deficiency, celiac disease, growth hormone deficiency, and sepiapterin reductase deficiency .

Dopamine 3-O-sulfate	Endogenous Metabolite	Metabolic Disease
Dopamine 3-O-sulfate mainly exists in plasma and can be used as a biomarker to characterize aromatic amino acid decarboxylase (AADC) deficiency .

2-Amino-5-phenylpyridine	Endogenous Metabolite	Cancer
2-Amino-5-phenylpyridine is a mutagenic heterocyclic aromatic amine that is formed by pyrolysis of phenylalanine in proteins. 2-Amino-5-phenylpyridine is in broiled sardines and is considered as potentially carcinogenic .

L-Tyrosine-13C9,15N	Isotope-Labeled Compounds	Neurological Disease
L-Tyrosine- ¹³C₉, ¹⁵N is the ¹³C- and ¹⁵N-labeled L-Tyrosine. L-Tyrosine is an aromatic nonessential amino acid synthesized from the essential amino acid phenylalanine. L-Tyrosine is a precursor for several important neurotransmitters (epinephrine, norepinephrine, dopamine) .

DSPE-PEG10000-Amine ammonium DSPE-PEG10000-NH2 ammonium	Liposome	Others
DSPE-PEG10000-Amine ammonium is a phosphoethanolamine involved in the synthesis of liposomes for delivery systems. The amino group of DSPE-PEG10000-Amine ammonium can be converted into aromatic aldehydes by reacting with acetone-protected aromatic hydrazines on the surface of bovine carbonic anhydrase (BCA) molecules. Liposomes form a liposome-BAH-BCA conjugate by forming a bisarylhydrazone (BAH) with the target enzyme molecule. The conjugate catalyzes the hydration of carbon dioxide to bicarbonate.

DSPE-PEG5000-Amine ammonium DSPE-PEG5000-NH2 ammonium	Liposome	Others
DSPE-PEG5000-Amine ammonium is a phosphoethanolamine involved in the synthesis of liposomes for delivery systems. DSPE-PEG5000-Amine ammonium amino group can be converted to aromatic aldehydes that react with acetone-protected aromatic hydrazides on the surface of the bovine carbonic anhydrase (BCA) molecule. Liposomes produce liposome-Bah-BCA conjugates by forming diaryl hydrazone (BAH) with target enzyme molecules. The conjugate catalyzes the hydration of carbon dioxide to bicarbonate.

Homovanillic acid-d3 Vanilacetic acid-d₃	Isotope-Labeled Compounds Autophagy Endogenous Metabolite Drug Metabolite	Neurological Disease Metabolic Disease
Homovanillic acid-d₃ (Vanilacetic acid-d₃) is the deuterium labeled Homovanillic acid (HY-N0384). Homovanillic acid (Vanilacetic acid) is a dopamine metabolite found to be associated with aromatic L-amino acid decarboxylase deficiency, celiac disease, growth hormone deficiency, and sepiapterin reductase deficiency .

3-O-Methyl-DL-DOPA (Standard) 3-Methoxytyrosine (Standard)	Endogenous Metabolite Reference Standards	Neurological Disease
3-O-Methyl-DL-DOPA (Standard) is the analytical standard of 3-O-Methyl-DL-DOPA. This product is intended for research and analytical applications. 3-O-Methyl-DL-DOPA is an endogenous metabolite present in Cerebrospinal_Fluid that can be used for the research of Epilepsy, Purine Nucleoside Phosphorylase Deficiency and Aromatic L Amino Acid Decarboxylase Deficiency [4].

Benserazide hydrochloride (Standard) Ro 4-4602 hydrochloride (Standard)	Reference Standards Pyruvate Kinase	Neurological Disease Cancer
Benserazide hydrochloride (Standard) (Serazide (Standard)) is the analytical standard of Benserazide hydrochloride (HY-B0404A). This product is intended for research and analytical applications. Benserazide hydrochloride (Serazide) is an aromatic L-amino acid decarboxylase (AADC) and L-DOPA decarboxylase inhibitor. Benserazide hydrochloride is also a PKM2 inhibitor. Benserazide hydrochloride directly binds to and blocks PKM2 enzyme activity, leading to inhibition of aerobic glycolysis concurrent up-regulation of OXPHOS. Benserazide hydrochloride can be used for the study of Parkinson's disease and melanoma .

Glyphosate-d2	Isotope-Labeled Compounds Apoptosis Autophagy Necroptosis	Neurological Disease
Glyphosate-d₂ is the deuterium labeled Glyphosate. Glyphosate is an herbicidal derivative of the amino acid glycine. Glyphosate targets and blocks a plant metabolic pathway not found in animals, the shikimate pathway, required for the synthesis of aromatic amino acids in plants .

Homovanillic acid-d2 Vanilacetic acid-d₂	Isotope-Labeled Compounds Autophagy Endogenous Metabolite Drug Metabolite	Neurological Disease Metabolic Disease
Homovanillic acid-d₂ (Vanilacetic acid-d₂) is the deuterium labeled Homovanillic acid (HY-N0384). Homovanillic acid (Vanilacetic acid) is a dopamine metabolite found to be associated with aromatic L-amino acid decarboxylase deficiency, celiac disease, growth hormone deficiency, and sepiapterin reductase deficiency .

Benserazide-d3 hydrochloride Ro 4-4602-d3 hydrochloride	Isotope-Labeled Compounds Pyruvate Kinase	Neurological Disease Cancer
Benserazide-d₃ (hydrochloride) is the deuterium labeled Benserazide hydrochloride (HY-B0404A). Benserazide hydrochloride (Serazide) is an aromatic L-amino acid decarboxylase (AADC) and L-DOPA decarboxylase inhibitor. Benserazide hydrochloride is also a PKM2 inhibitor. Benserazide hydrochloride directly binds to and blocks PKM2 enzyme activity, leading to inhibition of aerobic glycolysis concurrent up-regulation of OXPHOS. Benserazide hydrochloride can be used for the study of Parkinson's disease and melanoma .

N-Acetyl-DL-phenylalanine β-naphthyl ester	Fluorescent Dye	Infection Metabolic Disease
N-Acetyl-DL-phenylalanine β-naphthyl ester is an aromatic amino acid ester, which functions as a chromogenic substrate for chymotrypsin and microbial serine proteases such as subtilisin .

Cat. No.	Product Name

HY-L928

GPCR Targeted Diversity Library

7,113 compounds

G protein-coupled receptors (GPCRs) are membrane proteins in humans and one of the most important targets in drug discovery. Approximately 35% of launched drugs are targeted GPCRs, making them a crucial class of targets in drug discovery.

The orthosteric site of a GPCR is its endogenous ligand’s (such as neurotransmitters or hormones) binding site. This site plays a central role in signal transduction. Small molecules binding to this site typically contain a protonatable amino group, enabling the formation of salt bridges or hydrogen bonds with acidic residues in the binding pocket. In contrast, the allosteric site does not directly initiate signaling but modulates the signal intensity of the GPCR by altering or stabilizing the conformation of the orthosteric site. Small molecules binding to the allosteric site often contain multiple aromatic rings to occupy hydrophobic pockets and achieve their functional effects.

MCE has collected over 7,113 reported bioactive molecules targeting GPCRs, covering Class A, B, and C GPCRs. These small molecules were subjected to AI representation to extract 2D and 3D features. Subsequently, we do screening by AI score based on similarity to identify molecules in diversity library highly similar to the reported bioactive molecules in both 2D and 3D, with a threshold greater than 0.7. Further screening based on cLogP was applied to select molecules with good lipophilicity, which facilitates the binding of small molecules to GPCRs. This diversity library can be widely applied to the discovery of compounds targeting GPCR proteins.

HY-L913

Tyrosine Focused Covalent Fragment Library

104 compounds

Recently, significant advancements in tyrosine-targeting electrophiles have primarily occurred in the field of protein-protein interactions (PPIs), where cysteine residues are often underrepresented and novel chemistries are needed to address these interfaces. In this context, tyrosines are frequently more accessible compared to more buried binding sites. Moreover, they are commonly found at "hot spots," which are functional epitopes of PPIs, with 12.3% of the residues consisting of tyrosines. This prevalence is likely due to the hydrophobic nature of tyrosine, its ability to participate in aromatic π-interactions, and its capacity for hydrogen bonding. Beyond PPIs, some progress has also been made in covalent tyrosine targeting in other areas where more commonly addressed side chains are lacking. Even though tyrosine has a slightly lower pKa value compared to the protonated lysine side chain (approximately 10 vs. 10.5 for the unprotected amino acid side chains), significantly less progress has been made in the development of tyrosine-targeted covalent ligands compared to lysine. This is likely due to the reduced flexibility of the tyrosine side chain and the greater steric hindrance of its hydroxy group, which makes it more challenging to adopt suitable reaction geometries.

Through careful selection, we constructed a structural filter containing over 110 electrophilic groups. By analyzing the electrophilic fragments selected by the structural filter, we removed any molecules with trivial or undesirable structural features. Ultimately, we obtained 124 fragment molecules which can target tyrosine residue and can be used for fragment-based covalent drug discovery.

Cat. No.	Product Name	Type

HY-D0017

Dansyl chloride DNSCl	Fluorescent Dyes
Dansyl chloride is a reagent that produces stable blue or blue-green fluorescent sulfonamide adducts in the reaction of aliphatic and aromatic amines with primary amino groups, and is widely used for modified amino acids, protein sequencing and amino acid analysis .

HY-D0193A

Ponceau 4R (85%)

acid Red 18 (85%); New Coccine (85%)

Fluorescent Dyes

Ponceau 4R (85%) (Acid Red 18 (85%); New Coccine (85%)) is an orally active synthetic food colorant and a HSA-binding aggregator. Ponceau 4R (85%) binds to HSA, inducing its partial unfolding, conformational changes and aggregation. Ponceau 4R (85%) serves as a food colorant and can be used in research on diseases including type Ⅱ diabetes, Parkinson's disease, Huntington's disease and spongiform encephalopathy .

HY-W141825

N-Acetyl-DL-phenylalanine β-naphthyl ester	Fluorescent Dyes
N-Acetyl-DL-phenylalanine β-naphthyl ester is an aromatic amino acid ester, which functions as a chromogenic substrate for chymotrypsin and microbial serine proteases such as subtilisin .

HY-D2475

2-Amino-5-methoxybenzamidoxime	Fluorescent Dyes
2-Amino-5-methoxybenzamidoxime is a chemical probe for detection of ketone, including aromatic ketones, hydroxyl ketones, cyclic ketones and aliphatic ketones. 2-Amino-5-methoxybenzamidoxime exhibits an excitation maximal wavelength of 389 nm and a emission maximal wavelength of 515 nm .

Cat. No.	Product Name	Type

HY-W440823A

DSPE-PEG1000-Amine ammonium

DSPE-PEG1000-NH2 ammonium

Biochemical Assay Reagents

DSPE-PEG1000-Amine (DSPE-PEG1000-NH2) ammonium is a 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-polyethylene glycol conjugate with a terminal amino group. DSPE-PEG1000-Amine ammonium can functionalize the surface of PLGA-lecithin-PEG core-shell nanoparticles to introduce positive surface charges. The amino group of DSPE-PEG1000-Amine ammonium can be converted into an aromatic aldehyde to react with the acetone-protected aromatic hydrazide on the surface of bovine carbonic anhydrase (BCA) molecules .

HY-N9934

(-)-3-Dehydroshikimic acid 3-DHS; 5-Dehydroshikimic acid	Biochemical Assay Reagents
(-)-3-Dehydroshikimic acid (3-DHS; 5-Dehydroshikimic acid) is an intermediate in the biosynthesis of aromatic amino acids. (-)-3-Dehydroshikimic acid shows antioxidant activity .

HY-155908

DSPE-PEG10000-Amine ammonium

DSPE-PEG10000-NH2 ammonium

Biochemical Assay Reagents

DSPE-PEG10000-Amine ammonium is a phosphoethanolamine involved in the synthesis of liposomes for delivery systems. The amino group of DSPE-PEG10000-Amine ammonium can be converted into aromatic aldehydes by reacting with acetone-protected aromatic hydrazines on the surface of bovine carbonic anhydrase (BCA) molecules. Liposomes form a liposome-BAH-BCA conjugate by forming a bisarylhydrazone (BAH) with the target enzyme molecule. The conjugate catalyzes the hydration of carbon dioxide to bicarbonate.

HY-155907

DSPE-PEG5000-Amine ammonium

DSPE-PEG5000-NH2 ammonium

Biochemical Assay Reagents

DSPE-PEG5000-Amine ammonium is a phosphoethanolamine involved in the synthesis of liposomes for delivery systems. DSPE-PEG5000-Amine ammonium amino group can be converted to aromatic aldehydes that react with acetone-protected aromatic hydrazides on the surface of the bovine carbonic anhydrase (BCA) molecule. Liposomes produce liposome-Bah-BCA conjugates by forming diaryl hydrazone (BAH) with target enzyme molecules. The conjugate catalyzes the hydration of carbon dioxide to bicarbonate.

HY-W002114

4-Amino-3-hydroxybenzoic acid

Biochemical Assay Reagents

4-Amino-3-hydroxybenzoic acid is an aromatic substrate degradable by Bordetella sp. strain 10d. 4-Amino-3-hydroxybenzoic acid can serve as a carbon source, nitrogen source and energy source for the growth of Bordetella sp. strain 10d. 4-Amino-3-hydroxybenzoic acid acts as a substrate for 2-amino-5-carboxymuconate-6-semialdehyde deaminase and 4-amino-3-hydroxybenzoate 2,3-dioxygenase .

HY-N9934R

(-)-3-Dehydroshikimic acid (Standard) 3-DHS (Standard); 5-Dehydroshikimic acid (Standard)	Biochemical Assay Reagents
Isonicotinic acid (Standard) is the analytical standard of Isonicotinic acid. This product is intended for research and analytical applications. Isonicotinic acid is a metabolite of Isoniazid. Isoniazid is converted to Isonicotinic acid by hydrazinolysis, with the Isoniazid to Isonicotinic acid biotransformation also to be catalyzed by cytochrome P450 (CYP) enzymes, e.g., CYP2C .

Cat. No.	Product Name	Target	Research Area

HY-W019599

4-Chloro-L-phenylalanine L-PCPA	5-HT Receptor Tryptophan Hydroxylase	Neurological Disease
4-Chloro-L-phenylalanine (L-PCPA) is a tryptophan hydroxylase inhibitor targeting TPH1 and TPH2, with the activity of blocking serotonin biosynthesis. 4-Chloro-L-phenylalanine reduces the levels of serotonin and its metabolites in the brain without impairing the survival of serotonergic neurons. 4-Chloro-L-phenylalanine enhances anhedonic, depression-like and anxiety-like behaviors in mice with depleted noradrenergic and dopaminergic neurons. 4-Chloro-L-phenylalanine acts as a decarboxylation substrate for aromatic L-amino acid decarboxylase from Bacillus atrophaeus. 4-Chloro-L-phenylalanine can be used in studies related to Parkinson's disease .

HY-P4560

H-Pro-Phe-OH Pro-Phe	Angiotensin-converting Enzyme (ACE)	Cardiovascular Disease
H-Pro-Phe-OH is a dipeptide containing proline and phenylalanine, which can serve as a substrate for prolinase. H-Pro-Phe-OH can also be used for polypeptide synthesis, where phenylalanine is an aromatic amino acid that can inhibit the activity of Angiotensin-converting enzyme (ACE, HY-P2983) .

HY-P1512A

Antioxidant peptide A TFA	Peptides	Cancer
Antioxidant peptide A TFA is a short peptide, which contains alternative aromatic or sulfur-containing amino acid. The side chains of Antioxidant peptide A are believed to contribute to strong radical scavenging activities of peptides in the cancer cell .

HY-P1512

Antioxidant peptide A	SOD	Cancer
Antioxidant peptide A is a short peptide, which contains alternative aromatic or sulfur-containing amino acid. The side chains of Antioxidant peptide A are believed to contribute to strong radical scavenging activities of peptides in the cancer cell.

HY-P2787

Pro-Phe-Phe	Peptides	Others
Pro-Phe-Phe is the most aggregation-prone tripeptide of natural amino acids. Pro-Phe-Phe forms unique helical-like sheets that mate via aromatic dry interfaces. Pro-Phe-Phe can be used for the design of modular super-helical self-assembling nanostructures .

Cat. No.	Product Name	Target	Research Area	Image

HY-P992345

DS002	Trk Receptor	Neurological Disease
DS002 is a human monoclonal antibody targeting NGF/bNGF, with an IC₅₀ of 6.60 nM against human NGF, 1.98 nM against rat NGF, and 8.46 nM against mouse NGF. DS002 blocks NGF-TrkA binding, interrupts pain signal transduction, inhibits TrkA-mediated downstream signaling pathways, and alters aromatic amino acid metabolic pathways. DS002 inhibits cancer cell proliferation. DS002 exerts a preventive effect on Paclitaxel-, Cisplatin- and Vincristine-induced peripheral neuropathy in rats. DS002 can be used in studies related to chronic pain and chemotherapy-induced peripheral neuropathy .

HY-P992360

GT-002	GABA Receptor	Neurological Disease Cancer
GT-002 is a partial positive allosteric modulator targeting the α3 subtype of GABAA receptors, as well as a specific binder of tumor-associated TF-glycosylated LYPD3. GT-002 mildly enhances GABA-induced chloride currents by binding to the benzodiazepine site of GABAA receptors, thereby alleviating prefrontal hypofunction and improving cognitive, memory and social interaction abilities. GT-002 can be used in research related to schizophrenia spectrum disorders, various squamous cell carcinomas, colorectal cancer, non-small cell lung cancer, and aromatic L-amino acid decarboxylase deficiency .

Species:	Human (4) Mouse (1)
Tag:	His (4) Strep (1) Tag Free (1)
Source:	sf9 insect cells (1) Sf9 insect cells (1) E. coli (3)

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HY-P701909

	DDC Protein, Human DDC; aromatic-L-amino-acid decarboxylase; AADC; DOPA decarboxylase; DDC	Human	E. coli
	DDC protein plays a central role in neurotransmitter synthesis by catalyzing the decarboxylation of L-3,4-dihydroxyphenylalanine (DOPA) to produce dopamine and L-5-hydroxytryptophan to produce serotonin. DDC Protein, Human is the recombinant human-derived DDC protein, expressed by E. coli , with tag free.

HY-P74204

	DDC Protein, Mouse (sf9, His) aromatic-L-amino-acid decarboxylase; AADC; DOPA decarboxylase; DDC	Mouse	Sf9 insect cells
	The DDC protein plays a key role in neurotransmitter synthesis as it catalyzes the decarboxylation of L-3,4-dihydroxyphenylalanine (DOPA) to produce dopamine and L-5-hydroxytryptophan to produce serotonin. These enzymatic reactions represent key steps in neurotransmitter biosynthesis and are essential for the normal functioning of the central nervous system. DDC Protein, Mouse (sf9, His) is the recombinant mouse-derived DDC protein, expressed by Sf9 insect cells , with C-His labeled tag.

HY-P701910

	DDC Protein, Human (His, Strep II) DDC; aromatic-L-amino-acid decarboxylase; AADC; DOPA decarboxylase; DDC	Human	E. coli
	DDC protein plays a central role in neurotransmitter synthesis by catalyzing the decarboxylation of L-3,4-dihydroxyphenylalanine (DOPA) to produce dopamine and L-5-hydroxytryptophan to produce serotonin. DDC Protein, Human (His, Strep II) is the recombinant human-derived DDC protein, expressed by E. coli , with N-Strep II, N-6*His labeled tag.

HY-P704655

	DDC Protein, Human (Sf9, His) DDC; aromatic-L-amino-acid decarboxylase; AADC; DOPA decarboxylase; DDC	Human	sf9 insect cells
	DDC protein plays a central role in neurotransmitter synthesis by catalyzing the decarboxylation of L-3,4-dihydroxyphenylalanine (DOPA) to produce dopamine and L-5-hydroxytryptophan to produce serotonin. DDC Protein, Human (Sf9, His) is the recombinant human-derived DDC protein, expressed by sf9 insect cells, with C-His labeled tag.

HY-P7457

	ACY3 Protein, Human (His) rHuACY3, His; N-acyl-aromatic-L-amino acid amidohydrolase; ACY-3	Human	E. coli
	ACY3 Protein, Human (His) is human recombinant ACY3 with a N-terminal His tag. ACY3 Protein, Human (His) plays an important role in deacetylating mercapturic acids in kidney proximal tubules.

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HY-P82683

	DOPA Decarboxylase Antibody (YA2428) AADC; aromatic L amino acid Decarboxylase; DDC; DOPA decarboxylase (aromatic L-amino acid decarboxylase); DOPA decarboxylase	WB	Human, Mouse, Rat
	DOPA Decarboxylase Antibody (YA2428) is a Rabbit-derived and non-conjugated IgG monoclonal antibody, targeting to DOPA Decarboxylase.

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HY-119323

7-Azido-4-methylcoumarin 1 Publications Verification		Azide Labeling and Fluorescence Imaging
7-Azido-4-methylcoumarin is a selective coumarin-based fluorescent probe for hydrogen sulfide (H₂S). In the presence of H₂S, the aromatic azido group of 7-Azido-4-methylcoumarin is selectively reduced to produce the fluorescently active 7-amino-4-methylcoumarin (AMC). 7-Azido-4-methylcoumarin binds to the coumarin/phenol-binding site of BSA, the aglycone-binding site of UGT1A6, and the substrate-binding site of SULT1A1, respectively. 7-Azido-4-methylcoumarin retains its fluorescent properties after covalent binding, acts as a fluorescent H₂S probe, and does not react with cysteine, homocysteine or glutathione (Ex/Em = 340/445 nm) .

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HY-W440823A

DSPE-PEG1000-Amine ammonium DSPE-PEG1000-NH2 ammonium		Pegylated Lipids
DSPE-PEG1000-Amine (DSPE-PEG1000-NH2) ammonium is a 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-polyethylene glycol conjugate with a terminal amino group. DSPE-PEG1000-Amine ammonium can functionalize the surface of PLGA-lecithin-PEG core-shell nanoparticles to introduce positive surface charges. The amino group of DSPE-PEG1000-Amine ammonium can be converted into an aromatic aldehyde to react with the acetone-protected aromatic hydrazide on the surface of bovine carbonic anhydrase (BCA) molecules .

HY-155908

DSPE-PEG10000-Amine ammonium DSPE-PEG10000-NH2 ammonium		Pegylated Lipids
DSPE-PEG10000-Amine ammonium is a phosphoethanolamine involved in the synthesis of liposomes for delivery systems. The amino group of DSPE-PEG10000-Amine ammonium can be converted into aromatic aldehydes by reacting with acetone-protected aromatic hydrazines on the surface of bovine carbonic anhydrase (BCA) molecules. Liposomes form a liposome-BAH-BCA conjugate by forming a bisarylhydrazone (BAH) with the target enzyme molecule. The conjugate catalyzes the hydration of carbon dioxide to bicarbonate.

HY-155907

DSPE-PEG5000-Amine ammonium DSPE-PEG5000-NH2 ammonium		Pegylated Lipids
DSPE-PEG5000-Amine ammonium is a phosphoethanolamine involved in the synthesis of liposomes for delivery systems. DSPE-PEG5000-Amine ammonium amino group can be converted to aromatic aldehydes that react with acetone-protected aromatic hydrazides on the surface of the bovine carbonic anhydrase (BCA) molecule. Liposomes produce liposome-Bah-BCA conjugates by forming diaryl hydrazone (BAH) with target enzyme molecules. The conjugate catalyzes the hydration of carbon dioxide to bicarbonate.

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