Peptide YY (Peptide YY)

PYY was isolated from the extract of pig duodenum and shown to be a polypeptide consisting of 36 amino acids residues. PYY is homologous to pancreatic polypeptide and neuropeptide Y. PYY is localized mainly in endocrine cells in the intestine. PYY shows an inhibitory action on contraction of the gastrointestinal tract and on secretion of pancreatic and gastric juice. PYY is released by taking diet.