Description

Cysteinyltyrosine CAS NO 1089-23-2 is a high-purity dipeptide composed of the amino acids cysteine and tyrosine, serving as a critical biochemical building block and research standard. Its primary value lies in its role as a model compound for studying peptide structure, enzyme-substrate interactions, and oxidative stress pathways in biological systems. This product is essential for researchers and manufacturers in the pharmaceutical, biotechnology, and life science sectors who require precise and reliable reference materials for analytical method development, biochemical assays, and advanced peptide synthesis.

Application

• Biochemical Research Standard: Used as a reference compound in mass spectrometry (MS), high-performance liquid chromatography (HPLC), and nuclear magnetic resonance (NMR) for method validation and calibration.
• Enzymology Studies: Serves as a substrate or inhibitor model for investigating the activity of proteases, peptidases, and tyrosine-related enzymes.
• Oxidative Stress Research: Employed in studies exploring the role of thiol groups (from cysteine) and phenolic groups (from tyrosine) in redox biology and free radical chemistry.
• Peptide Synthesis Intermediate: Acts as a key building block in the solid-phase or solution-phase synthesis of more complex peptides and peptide conjugates.
• Pharmaceutical Development: Utilized in pre-formulation studies and as a marker in stability testing for peptide-based drug candidates.
• Nutritional Science: Investigated for its potential metabolic properties and as a model for understanding dipeptide absorption and utilization.

Basic Information

Product Name	Cysteinyltyrosine
CAS No.	1089-23-2
Molecular Formula	C12H15N3O5S
Molecular Weight	313.33 g/mol
Synonyms	L-Cysteinyl-L-tyrosine; Cys-Tyr; CY; H-Cys-Tyr-OH; Cysteine-tyrosine dipeptide; L-Tyrosine, L-cysteinyl-; NSC 334358; (2S)-2-Amino-3-[(2R)-2-amino-3-(4-hydroxyphenyl)propanoylsulfanyl]propanoic acid
EINECS	Contact for details

Quality Control

Every batch of Cysteinyltyrosine is manufactured and tested under strict quality management systems to ensure identity, purity, and consistency. We provide comprehensive analytical data including HPLC purity, chiral purity, and residual solvent analysis. A Certificate of Analysis (COA) is supplied with each shipment, detailing the results against our stringent in-house specifications. Our quality commitment supports applications requiring research-grade to pharmaceutical intermediate standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed in a dry environment to prevent absorption of moisture. For long-term storage, consider desiccants or inert atmosphere.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Conforms to reference
Assay (HPLC)	≥ 98.0%
Chiral Purity	≥ 99.0% (L-isomer)
Water Content (KF)	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.