title: The NH2-terminal tridecapeptide fragment of gastrin-17 in serum from duodenal ulcer patients.
abstract: The concentration of gastrin in serum from 47 fasting patients with duodenal ulcer was measured with two radioimmunoassays, one specific for the COOH- and the other specific for NH2-terminal sequence of gastrin-17. The COOH-terminal assay measured 13 +/- 2 pmol and the NH2-terminal 42 +/- 7 pmol-equivalent gastrin-17 per litre (mean +/- S.E.M.). This result, corroborated by gel chromatography, shows that an NH2-terminal fragment of gastrin-17, presumably the tridecapeptide, circulates in concentrations higher than those of the four known gastrin components. The abundance of NH2-terminal fragment in serum suggests that the complementary COOH-terminal tetrapeptide fragment of gastrin-17 is also produced in large quantities.
mesh_terms: D000595:Amino Acid Sequence; D002850:Chromatography, Gel; D004381:Duodenal Ulcer / Q000097:blood*; D005260:Female; D005755:Gastrins / Q000097:blood*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010446:Peptide Fragments / Q000097:blood*; D011863:Radioimmunoassay
chemical_list: D005755:Gastrins; D010446:Peptide Fragments