[Retinylpalmitate and retinylacetate hydrolases in the intestinal juice of dogs secreted on an empty stomach and on the intravenous administration of protein hydrolysates].

Intravenous injection of caseine hydrolysate, hydrolysin or amino-peptide to dogs was not attended by any substantial changes in the activity of retinylpalmitate- and retinyl-acetate-hydrolase in the intestinal juice, as compared to the juice secreted on an empty stomach. The mutual relation of these enzymes activity in the intestinal juice and jejunal wall was dissimilar, which testifies to their different localization in the intestinal tissues.