A hormone produced by the anterior pituitary gland that stimulates the adrenal cortex

Pro-opiomelanocortin is a precursor polypeptide with 241 amino acid residues.

Corticotropin-like intermediate [lobe] peptide, also known as adrenocorticotropic hormone fragment 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.