H-Leu-Pro-Asn-Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH2

Kisspeptin 13 inhibits glucose-induced insulin secretion with an IC50 of 1.2 nM. Kisspeptin 13 activates the hypothalamic-pituitary-adrenal (HPA) axis, causes hyperthermia, motor behavior and anxiety in rats. Kisspeptin 13 interacts with α2-adrenergic and 5-HT2 serotonin receptors, exhibits antidepressant efficacy. Kisspeptin 13 is an activator for GPR54 and GnRH receptor, which enhances memory and can be used in Alzheimer's disease research[1][2][3][4].

[1] Jiang JH, et al. Kisspeptin-13 enhances memory and mitigates memory impairment induced by Aβ1-42 in mice novel object and object location recognition tasks. Neurobiol Learn Mem. 2015 Sep;123:187-95. DOI:10.1016/j.nlm.2015.05.010
[2] Silvestre RA, et al., Kisspeptin-13 inhibits insulin secretion without affecting glucagon or somatostatin release: study in the perfused rat pancreas. J Endocrinol. 2008 Feb;196(2):283-90. DOI:10.1677/JOE-07-0454
[3] Csabafi K, et al., Effects of kisspeptin-13 on the hypothalamic-pituitary-adrenal axis, thermoregulation, anxiety and locomotor activity in rats. Behav Brain Res. 2013 Mar 15;241:56-61. DOI:10.1016/j.bbr.2012.11.039
[4] Tanaka M, et al., Neurotransmissions of antidepressant-like effects of kisspeptin-13. Regul Pept. 2013 Jan 10;180:1-4. DOI:10.1016/j.regpep.2012.08.017