Brain Natriuretic Peptide is an alias for the gene, Natriuretic peptide B, in humans. Other names include: Natriuretic peptides B; Gamma-brain natriuretic peptide; BNP. The encoded protein has an amino acid length of 134 and a mass of 14.7 kDa. Brain Natriuretic Peptide is a member of the Natriuretic peptide family. This gene shares homology with other species, including: Mouse, Rat, Frog.