Brain natriuretic peptide or B-type natriuretic peptide (BNP) (also ventricular natriuretic peptide) is a 32-amino acid peptide secreted by heart ventricles in response to excessive stretching of heart muscle cells (cardiomyocytes).ONE-LETTER SEQUENCE: NSKMAHSSSCFGQKIDRIGAVSRLGCDGLRLF (Cys10 and 26 bridge)MOLECULAR FORMULA: C146H239N47O44S3MOLECULAR WEIGHT:3453STORAGE CONDITIONS: -20 5C, CAS REGISTRY NUMBER: [133448-20-1], RESEARCH AREA: CardiovascularREFERENCES: M. Kojima et al., BBRC, 159, 1420 (1989)