The course of digestion of different food proteins in the rat

Abstract

I. Single meals of casein, a-protein, a commercial soya-bean assay protein, wheat gluten and zein ( 2 4 3 mg nitrogenlroo g body-weight) were given with and without Supplements of their limiting amino acids to groups of rats housed in anti-coprophagy cages, after an 18 h fast. At intervals after feeding, rats were anaesthetized, sampies of portal and cardiac blood were taken for the determination of free amino acid concentrations in dcproteinized plasma (PA4 concentrations), and the contents of the gastro-intestinal tract were collected and analysed.