a single polypeptide chain of 69 amino acid residues, MW 7687 (II) & 7668 Da (IV) from duck pancreas; the only difference between the two is the replacement of Arg for His residue in the C-terminal position of DPTI IV; amino acid sequence in first source
Source
Comp Biochem Physiol B Biochem Mol Biol 1999 Nov;124(3):281-8
