Characterization of a gastrin releasing peptide from porcine non-antral gastric tissue

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Abstract

A heptacosapeptide with potent gastrin releasing activity has been isolated from porcine non-antral gastric and intestinal tissue. The amino acid sequence suggested from a preliminary study on the gastric peptide is: Ala-Pro-Val-Ser-Val-Gly-Gly-Gly-Thr-Val-Leu-Ala-Lys-Met-Tyr-Pro-Arg-Gly-Asn-His-Trp-Ala-Val-Gly-His-Leu-Met-NH2. Striking homology in the C-terminal region is seen with bombesin, accounting for the similar bioactivities of the two peptides. Some structural resemblance with porcine cholecystokinin in the N-terminal region is noted.

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