A Gastric Inhibitory Polypeptide II: The Complete Amino Acid Sequence

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Abstract
Porcine gastric inhibitory polypeptide is a 43 amino acid residue polypeptide with the amino acid sequence Tyr–Ala–Glu–Gly–Thr–Phe–Ile–Ser–Asp–Tyr–Ser–Ile–Ala–Met–Asp–Lys–Ile–Arg–Gln–Gln–Asp–Phe–Val–Asn–Trp–Leu–Leu–Ala–Gln–Gln–Lys–Gly–Lys–Lys–Ser–Asp–Trp–Lys–His–Asn–Ile–Thr–Gln. Fifteen of the first 26 amino acids occur in the same position as they do in porcine glucagon, and nine of the first 26 in the same position as in porcine secretin. The calculated molecular weight of the polypeptide is 5105.

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