Peptide 5 (CAS 916977-43-0) – Immunomodulatory Antagonist Peptide API

Peptide 5 (CAS 916977-43-0) is a high-purity immunomodulatory antagonist peptide API, featuring ≥98% purity (HPLC-verified) and a 16-amino-acid structure (molecular weight: ~2045 Da). As a specific CXCR4 chemokine receptor antagonist, it blocks CXCR4-mediated signal transduction—its core mechanism for inhibiting tumor cell migration and regulating immune cell trafficking.

This lyophilized peptide exhibits excellent water solubility and stable biological activity under -20℃ storage. It is widely used in preclinical research on tumor metastasis and immune regulation: it reduces cancer cell invasion in in vitro models and modulates the distribution of immune cells in inflammatory microenvironments. For pharmaceutical R&D teams, its specific CXCR4 targeting and consistent activity make it a reliable raw material for exploring tumor-immune interaction mechanisms.