Description

L-Cysteine, L-Cysteinyl-L-Leucyl-L-Seryl-L-α-Aspartylglycyl-L-Lysyl-L-Arginyl-L-Lysyl- is a synthetic peptide derivative of the essential amino acid L-Cysteine, designed for high-value research and pharmaceutical applications. This compound is critical for advanced biochemical studies, particularly in exploring peptide-based therapeutics and enzyme interactions. It serves as a key intermediate or active ingredient for researchers and manufacturers in the pharmaceutical, biotechnology, and life science sectors.

Application

• Pharmaceutical Research & Development: As a key intermediate in the synthesis of novel peptide-based drugs and therapeutic agents.
• Biochemical Studies: For investigating enzyme mechanisms, protein-protein interactions, and signal transduction pathways.
• Proteomics & Peptide Synthesis: Used as a building block in solid-phase peptide synthesis (SPPS) for creating custom peptides.
• Cell Culture & Media Supplementation: Potential application as a specialized nutrient or reducing agent in advanced cell culture media formulations.
• Reference Standard: Serves as a high-purity analytical standard for quality control and method validation in analytical laboratories.

Basic Information

Product Name	L-Cysteine, L-Cysteinyl-L-Leucyl-L-Seryl-L-α-Aspartylglycyl-L-Lysyl-L-Arginyl-L-Lysyl-
CAS No.	945245-76-1
Molecular Formula	C38H68N14O13S
Molecular Weight	937.09 g/mol
Synonyms	Cys-Leu-Ser-Asp-Gly-Lys-Arg-Lys; CLSDGLKRK; L-Cysteinyl-L-leucyl-L-seryl-L-α-aspartylglycyl-L-lysyl-L-arginyl-L-lysine; Cysteine-containing octapeptide; Cys-Leu-Ser-Asp-Gly-Lys-Arg-Lys peptide; Peptide CLSDGLKRK; CAS 945245-76-1
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. We offer material suitable for research and development, with quality parameters typically meeting or exceeding 95% purity (HPLC). Certificates of Analysis (COA) detailing identity, purity, and related substances are available upon request. Production can be aligned with cGMP principles for advanced applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and must be kept under dry conditions to prevent degradation. For long-term storage, consider desiccated or inert atmosphere conditions.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (HPLC/MS)	Conforms
Assay (HPLC)	≥ 95.0%
Purity (HPLC)	≥ 95.0%
Related Substances (HPLC)	Individual impurity ≤ 2.0%
Water Content (KF)	≤ 5.0%
Residue on Ignition	≤ 1.0%

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