1. Cohen, S., Virus-Induced Enzymes (Columbia University Press, New York, 1968).
2. Mathews, C., Bacteriophage Biochemistry, chs. 6 and 7 (Van Nostrand Reinhold Co., New York, 1971).
3. Hosoda, J., and Levinthal, C., Virology, 34, 709 (1968).
4. O'Farrell, P., Huang, W., and Gold, L., J. Biol. Chem. (in the press).
5. Laemmli, U., Nature, 227, 680 (1970).