... Chem. Soc., 85, 3660 (1963). (4) J. P. Greenstein and M. Winitz, "Chemistry of the Amino Acids," John Wiley and Sons, Inc., New York, N. Y., 1961. (5) Cf. ... J . , 55, 328 (1953). 102 Journal of the American Chemical Society 1 87:l 1 January 5, 1965 Page 5. Anal. Calcd. ...