Description

Seryl-Prolyl-Lysyl-Lysine CAS NO 121106-80-7 is a synthetic tetrapeptide composed of the amino acids serine, proline, and two lysine residues. This specific sequence is of significant interest in biochemical research and advanced cosmetic formulations due to its potential bioactive properties. It is primarily utilized by research institutions and manufacturers in the life sciences and personal care industries for developing novel therapeutic agents and high-performance skincare products.

Application

• Biomedical Research: Used as a reference standard or active ingredient in studies focused on peptide-protein interactions, enzyme substrates, and signal transduction pathways.
• Cosmetic & Skincare Formulations: Incorporated into anti-aging serums and creams for its potential role in supporting skin structure and hydration.
• Pharmaceutical Development: Serves as a key intermediate or active pharmaceutical ingredient (API) in the R&D of novel peptide-based drugs.
• Biochemical Reagents: Employed in enzymatic assays and as a substrate for studying the specificity of proteases and other enzymes.
• Nutraceuticals: Investigated for use in specialized dietary supplements targeting specific health and wellness benefits.

Basic Information

Product Name	Seryl-Prolyl-Lysyl-Lysine
CAS No.	121106-80-7
Molecular Formula	C23H42N8O7
Molecular Weight	542.63 g/mol
Synonyms	Ser-Pro-Lys-Lys; SPKK; H-Ser-Pro-Lys-Lys-OH; Tetrapeptide SPKK; Seryl-prolyl-lysyl-lysine; L-Seryl-L-prolyl-L-lysyl-L-lysine; Acetyl Tetrapeptide-3 (related cosmetic ingredient); (S)-2-((S)-1-((S)-6-amino-1-((S)-1-((S)-2-amino-3-hydroxypropanoyl)pyrrolidine-2-carbonyl)hexyl)amino)-1-oxohexan-2-yl)amino)-4-aminobutanoic acid
EINECS	Contact for details

Quality Control

Our Seryl-Prolyl-Lysyl-Lysine is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets rigorous specifications suitable for research and development applications. Certificates of Analysis (COA) detailing purity, residual solvents, and other critical parameters are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at 2-8°C (refrigerated) or as indicated on the label or COA. This product is hygroscopic (moisture-sensitive) and should be handled under dry conditions to maintain stability.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (HPLC/IR)	Conforms to reference standard
Assay (HPLC)	≥ 95.0%
Purity (HPLC)	≥ 98.0% (Total Peptide Content)
Water Content (KF)	≤ 5.0%
Residual Solvents (GC)	Meets ICH guidelines
Heavy Metals	≤ 20 ppm
Bacterial Endotoxins	Contact for details

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