The relative absorption of intravenously administered amino acids by the liver, kidney, and muscle of the rat.

The rate at which amino acids are removed from the blood by the organs has been previously reported (l-3). The methods used permitted only estimation of total amino acid nitrogen, and no information could be gained as to the fate of the individual amino acids injected. Quantitative paper chromatography (4) seemed to lend itself as a valuable method in studying the pattern of absorption of parenterally administered amino acids. For this work, aspartic acid, glutamic acid, glytine, and alanine were chosen.