OCCURRENCE OF ARGINYLGLUTAMINE IN GREEN ALGA, CLADOPHORA SPECIES

抄録

Paper chromatographic analyses of extracts from a fresh-water alga, Cladophora sp., showed the presence of two Sakaguchi-positive substances, which was isolated by means of ion exchange resins. These substances were identified as L-arginine and L-arginyl-L-glutamine, a new compound. However, there was no evidence that L-arginyl-L-glutamic acid is present as a preformed peptide in the material.
The author wishes to express his gratitude to Prof. S. Shibuya for his kind guidance, and to Assistant Prof. N. Izumiya for his valuable suggestions. This work was sup-ported in part by a Grant in Aid for the Miscellaneous Scientific Research from the Ministry of Education.