1. Simmons, N. S., Cohen, C., Szent-Gyorgyi, A. G., Wetlaufer, D. B., and Blout, E. R., J. Amer. Chem. Soc., 83, 4766 (1961).
2. Beychok, S., and Blout, E. R., J. Mol. Biol., 3, 169 (1961).
3. Jirgensons, B., Arch. Biochem. Biophys., 96, 314 (1962).
4. Moffitt, N. J., Chem. Phys., 25, 467 (1956); Proc. U. S. Nat. Acad. Sci., 42, 736 (1956). Moffitt, W., and Yang, J. T., ibid., 42, 596 (1956). For general review, see Urnes, P., and Doty, P., in Adv. Prot. Chem., 16, 402 (1961), edited by Anfinsen, C. B., Bailey, Kenneth, Anson, M. L., and Edsall, John, T.; Masson, S. F., Quart. Rev., 17, 20 (1963).
5. Strem, J., Krishna-Prasad, Y. S. R., and Schellman, J. A., Tetrahedron, 13, 176 (1961).