Description

Cysteinyl-Lysyl-Asparaginyl-Phenylalanine CAS NO 91853-93-9 is a synthetic tetrapeptide with the sequence Cys-Lys-Asn-Phe (CKNF). This compound is of significant interest in biochemical research and pharmaceutical development due to its specific amino acid sequence, which can mimic bioactive regions of larger proteins. It serves as a critical building block for researchers and manufacturers in the life sciences sector, particularly for studying protein-protein interactions, enzyme substrates, and as a precursor for more complex peptide synthesis.

Application

• Pharmaceutical Research & Development: Used as a reference standard, an intermediate in the synthesis of novel therapeutic peptides, or for structure-activity relationship (SAR) studies.
• Biochemical Assay Development: Serves as a substrate or inhibitor in enzymatic assays to study protease or kinase activity relevant to disease pathways.
• Cosmeceutical Formulations: Potential application as a bioactive ingredient in anti-aging or skin-repair formulations, leveraging peptide sequences that may influence cellular signaling.
• Academic Research: A key reagent for investigating peptide chemistry, stability, and delivery mechanisms in university and institutional labs.
• Diagnostic Kit Manufacturing: Can be utilized in the production of calibration standards or components for immunoassays and other diagnostic tests.
• Peptide Library Synthesis: Acts as a core sequence or building block in the combinatorial synthesis of peptide libraries for high-throughput screening.

Basic Information

Product Name	Cysteinyl-Lysyl-Asparaginyl-Phenylalanine
CAS No.	91853-93-9
Molecular Formula	C23H35N7O7S
Molecular Weight	553.63 g/mol
Synonyms	CKNF; Cys-Lys-Asn-Phe; L-Cysteinyl-L-lysyl-L-asparaginyl-L-phenylalanine; Tetrapeptide CKNF; H-Cys-Lys-Asn-Phe-OH; (S)-2-Amino-3-((R)-2-amino-6-((S)-2-amino-3-carbamoylpropanamido)hexanamido)-5-guanidinopentanoic acid (related linear sequence); Asparaginylphenylalanine cysteinyllysine
EINECS	Contact for details

Quality Control

Our Cysteinyl-Lysyl-Asparaginyl-Phenylalanine is produced under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity and MS for identity confirmation, to ensure it meets exacting standards for research and development. Certificates of Analysis (COA) with detailed chromatographic data are available upon request. We support compliance needs for cGMP, ISO, and other relevant regulatory frameworks.

Storage

Preserve in a tightly closed container, protected from light. Store at -20°C or below for long-term stability. This hygroscopic (moisture-sensitive) material should be kept in a cool, dry place and allowed to equilibrate to room temperature in a desiccator before opening to prevent condensation and hydrolysis. For optimal shelf life, store under an inert atmosphere.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (HPLC/MS)	Conforms
Purity (HPLC)	≥ 95.0%
Single Impurity (HPLC)	≤ 1.0%
Water Content (KF)	≤ 5.0%
Peptide Content	≥ 80.0%
Solubility	Soluble in water, DMSO

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