Canine and Human Gastric Digestion of Proteins in Vivo

Publisher Website
Google Scholar
Abstract
Gastric contents collected from a dog, in which duodenal regurgitation was prevented, contained at least 15 microbiologi-cally available amino acids. This was true whether the animal ate egg albumin or zein or was simply induced to secrete saliva and gastric juice by the sight and smell of appetizing food. Lysine and tryptophan, which are virtually absent from zein, were always found in gastric contents regardless of the nature of the test meal protein. The mixture that is normally discharged from the stomach into the duodenum appears, therefore, always to contain a rather complete assortment of amino acids in addition to whatever else it may contain. These amino acids may be secreted to some extent in the free state and arise in part from hydrolysis of ingested protein as well as from enzymes and other proteins present in saliva and gastric juice. The observations on the dog were confirmed in part by observations on 2 human subjects who ingested lactalbumin as the test meal.

This publication has 0 references indexed in Scilit: