Corticotropin-like intermediate [lobe] peptide (CLIP), also known as adrenocorticotropic hormone fragment 18-39 (ACTH(18-39)), is a naturally occurring, endogenous neuropeptide with a docosapeptide structure and the amino acid sequence Arg-Pro-Val-Lys-Val-Tyr-Pro-Asn-Gly-Ala-Glu-Asp-Glu-Ser-Ala-Glu-Ala-Phe-Pro-Leu-Glu-Phe.

CLIP is generated as a proteolyic cleavage product of adrenocorticotropic hormone (ACTH),[1][2] which in turn is a cleavage product of proopiomelanocortin (POMC).

[3] Its physiological role has been investigated in various tissues,[4][5] specifically in the central nervous system.

[6][7][8][9][10] It has been suggested to function as an insulin secretagogue in the pancreas.

[11]