This family features the N-terminal peptide of pro-opiomelanocortin (NPP). It is thought to represent an important pituitary peptide, given its high yield from pituitary glands, and exhibits a potent in vitro aldosterone-stimulating activity [1].

1: Complete amino acid sequence of a human pituitary glycopeptide: an important maturation product of pro-opiomelanocortin. Seidah NG, Chretien M; Proc Natl Acad Sci U S A 1981;78:4236-4240. PMID:6945581