Equipotency of little and minigastrin in the cat

Synthetic human non-sulphated gastrin heptadecapeptide (little gastrin) and tetradecapeptide (minigastrin) are equipotent stimulants of gastric acid and pepsin secretions in the conscious cat. This supports the thesis that minigastrin is a major physiologically active, circulating form of the hormone in the cat. It is estimated that little gastrin and minigastrin contribute equally to the gastric acid response to a protein meal in the cat.