Definition: A potent natriuretic and vasodilatory peptide or mixture of different-sized low molecular weight PEPTIDES derived from a common precursor and secreted mainly by the HEART ATRIUM. All these peptides share a sequence of about 20 AMINO ACIDS.
atrial natriuretic factor prohormone (95-126) [ ANF (95-126),ANP (95-126),Ularitide,atrial natriuretic peptide (95-126),atriopeptin (95-126),urodilatin ] a 32-amino acid peptide derived from (95-126 residues) of ANP PROHORMONE (1-126 residues); not biologically inactivated by a peptidase from dog kidney cortex membranes