vi Contents 



Information Content of Tracer Data With Respect to Steady-state Systems 181 

 MoNES Berman and Robert L. Schoenfeld 



The Domain of Information Theory in Biology 187 



Henry Quastler 



Discussion 196 



Some Membrane Phenomena from the Point of View of Information Theory 197 

 Herman Branson 



Efficiency of Information Transmission by Biochemical Co-factors 204 



Peter D. Klein 



Discussion 209 



Antigenic Specificity 211 



Bernard N. Jaroslovv and Henry Quastler 



Information Content and Biotopology of the Cell in Terms of Cell Organelles 218 

 Charles F. Ehret 



Quantification of Performance in a Logical Task With Uncertainty 230 



A. Rapoport 



PART IV. DESTRUCTION OF INFORMATION 

 BY IONIZING RADIATION 



Editorial Introduction 239 



Electron Spin Resonance in the Study of Radiation Damage 241 



Walter Gordy 



A Physical Mechanism for the Inactivation of Proteins by Ionizing Radiation 262 

 Robert Platzman and James Franck 



Information and Inactivation of Biological Material 276 



Harold J. Morowitz 



Discussion 28 1 



The Absence of Radiation-Induced Disulfide Interchanges 283 



Arthur L, Koch 



A Proposed Mechanism of Protein Inactivation 287 



L. G. Augenstine 

 Discussion 29 1 



PART V. AGING AND RADIATION DAMAGE 



Editorial Introduction 293 



A Study of Aging, Thermal Killing, and Radiation Damage by Information 

 Theory 297 



Hubert P. Yockey 



Entropic Contributions to Mortality and Aging 317 



George A. Sacher 



