The electrophoretic patterns of Prep. III of the gastric cancers and mucosa resembled each other. But, those of Preps. II's differed from each other, although they both demonstrated three boundaries. Concerning the amino acid composition, Preps. II's and III's were somewhat different qualitatively as well as quantitatively from each other in respective pair of preparations from the two sources. The optical rotations of a hydrolysate of the Preps. II's supported this fact. Combined with the analytical results in the former report, the present findings indicate that the corresponding proteins of gastric cancer and the mucosa are not identical despite of their resemblance in rough composition.
Through the Grant Committee for Scientific Researches was given a grant from the Education Department which enabled us to carry out this investigation. H. Masamune.