1. Opit, L. J., and Charnock, J. S., Nature, 208, 471 (1965).
2. Matsui, H., and Schwartz, A., Biochim. Biophys. Acta, 151, 655 (1968).
3. Albers, R. W., Koval, C. J., and Siegel, C. J., Molec. Pharmacol., 4, 324 (1968).
4. Hokin, L. E., J. Gen. Physiol., 54, 327S (1969).
5. Charnock, J. S., and Opit, L. J., in Biological Basis of Medicine (edit. by Bittar, E. E., and Bittar, N.), 1, 69 (Academic Press, London and New York, 1968).