1. Vinter, V., J. Appl. Bact., 20, 325 (1957).
2. Vinter, V., Fourth Int. Cong. Biochem., Vienna (1958). Supplement Int. Abstr. Biol. Sci., 129.
3. Kuratomi, K., Ohno, K., and Akabori, S., J. Biochem. (Tokyo), 44, 183 (1957).
4. St. Lorant, I., Z. physiol. Chem., 185, 245 (1929).