NCIt definition : Gastrin (101 aa, 11 kDa) is encoded by the human GAST gene. This protein plays a
role in the modulation of gastric acid and pancreatic digestive enzyme secretion.;
Alternative definition : NCI-GLOSS: A hormone released from special cells in the lining of the stomach after
eating. Gastrin causes the stomach to release an acid that helps digest food.;
NCIt note : The 101 amino acid prepro-form of gastrin can be cleaved between alanine residue 21
and serine 22 to generate the 80 amino acid progastrin. Intracellular gastrointestinal
progastrin can be further cleaved to form the main circulating biologically active
forms gastrin-34 (big gastrin) and gastrin-17 (little gastrin). Other processed forms
are possible including gastrin-71, gastrin-52, gastrin-14, and gastrin-6. (UniProt);