The amino acids in a polypeptide chain are linked by peptide bonds. The amino acids are joined by peptide bonds making a polypeptide chain. Amylin, or islet amyloid polypeptide (IAPP), is a 37-residue peptide hormone. A2 activity carried on the amino-terminal peptide of the capsid VP1 polypeptide. It binds to polypeptides in a constant weight ratio of 1.4 g SDS/g of polypeptide. One subunit is made of one polypeptide chain. Many proteins are actually assemblies of multiple polypeptide chains. This polypeptide is subsequently cleaved into individual polypeptide chains. Translation of the structural proteins produces a large polypeptide (110 Dalton). Other hormones produced include somatostatin, pancreatic polypeptide, amylin and ghrelin. The TSST-1 is secreted as a single polypeptide chain. A protein contains at least one long polypeptide. Other functions of motilin include increasing the release of pancreatic polypeptide and somatostatin. ADAM17 is an 824-amino acid polypeptide. It is however first synthesized as a single polypeptide called preproinsulin in beta cells.