1. 1. "Little" gastrin from most mammalian species are 17 amino acid peptides and the precursor "big" gastrins are 34 amino acid peptides. 2. 2. "Little" gastrins of the New World hystricomorphs, guinea-pig and chinchilla, are 16 amino acid peptides due to deletion of a glutamic acid in the region 6-9 from their NH2-terminus and the corresponding "big" gastrins are 33 amino acid peptides. 3. 3. Antral gastrins from the opossum, a New World marsupial, have a glutamic acid deletion in the same region as the hystricomorph gastrins. 4. 4. Opossum "big" gastrin is a 33 amino acid peptide with the following sequence: 〈ELGPQDLPYLTADLSKKQGPWLEEEEAYGWMDF#.
|Number of pages||4|
|Journal||Comparative Biochemistry and Physiology - B Biochemistry and Molecular Biology|
|State||Published - 1990|