...% of the amino acids existed as small peptides, and also from an equivalent mixture of free amino acids. 2. The effect of a high concentration of the dipeptide glycylglycine on the absorption of amino acid residues from these preparations was studied to quantify the importance of mucosal uptake of intact...

... and hydrolysis of l-methionyl-l-methionine (Met-Met) and glycylglycine (Gly-Gly) by tied loops along the length of the small intestine of the rat, and those of absorption of the equivalent l-methionine (Met) and glycine (Gly). 2. Absorption of Met-Met, or a mixture of Met-Met and Met, was maximal in the proximal...

...G. C. Cook 1. Using a double-lumen tube perfusion system the rates of glycine, glycylglycine, and glycylglycine and glucose absorption from a 30-cm jejunal segment have been studied in vivo in a group of relatively normal Zambian African subjects. 2. To determine the kinetic curve for glycine...