A. S. KOLASKAR, Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560012, India; A. V. LAKSHMINARAYANANtt and I<. P. SARATHY, Department of Biophysics and Theoretical Biology, University of Chicago, Chicago, Illinois 60637; and V. SASISEKHARAN, t Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560012, India and Department of Biophysics and Theoretical Biology, ...