Institut fur Physiologische Chemie [H. C. S.
R. W., H. G., P. R., W. E. G. M.], Universität, Duesbergweg6, 6500 Mainz, West Germany; Biophysics Division [Y. K.j,, National Cancer Center Research Institute, Tsukiji, Chuo-ku, Tokyo 104, Japan; Faculty of Science [D. SJ, Department of Chemistry, Belgrade, Yugoslavia