Kisspeptin-10 (also known as Metastin 45-54 or Kp-10) is a 10-amino-acid peptide corresponding to the bioactive C-terminal residues 45-54 of metastin, encoded by the KISS1 gene. Its amino acid sequence is Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH2 (YNWNSFGLRF-NH2) with a molecular formula of C63H83N17O14 and a molecular weight of approximately 1,302.4 g/mol (CAS 374675-21-5). Kisspeptin-10 is a potent endogenous ligand for the kisspeptin receptor (KISS1R, also known as GPR54), binding with high affinity and approximately 8-fold higher binding affinity than full-length metastin. Originally identified as a human metastasis suppressor gene product, kisspeptin-GPR54 signaling plays a critical role in initiating gonadotropin-releasing hormone (GnRH) secretion at puberty from the anterior pituitary. Also commonly searched as Metastin, Kp-10, or KISS1 peptide, it is supplied as a lyophilized powder for laboratory reference use. Triumphant Labs Kisspeptin-10 is provided strictly for in vitro research applications and is not approved for human or animal use.