ISOLATION AND PROPERTIES OF B(12) COENZYMES CONTAINING BENZIMIDAZOLE OR DIMETHYLBENZIMIDAZOLE.

2 Ibid., 45, 136-144 (1959). 3 Weil-Malherbe, H., Biochem. J., 40, 351-363 (1946). 4 Isenberg, I., and A. Szent-Gyorgyi, PROC. NATL. ACAD. Sci., 44, 857-862 (1958). 5 Fujimori, E., PROC. NAT. ACAD. Sci., 45, 133-136 (1959). 6 Biochemisches Taschenbuch, ed. H. M. Rouen (Springer-Verlag, 1956). 7 Mason, S. F., Chapter in Ciba Foundation Symposium on Chemistry and Biology of Pteridines, ed. G. E. W. Wolstenholme and M. P. Cameron (Little Brown and Company, 1954).