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2. Doherty, D. G., Burnett, jun., W. T., and Shapira, R., Radiation Res., 7, 13, 22 (1957).
3. Alexander, P., et al., Radiation Res., 2, 392 (1955).
4. Pihl, A., and Eldjarn, L., Pharmacol. Rev., 10, 437 (1958).
5. Laidler, K. J., “Introduction to the Chemistry of the Enzymes” (McGraw-Hill Book Co., Inc., New York, 1954).