VI 11 PREFACE 



in the transformation of energy. Thus the chloroplast structure plays a prominent 

 part in the transformation of radiant energy into the potential energy of oxidation- 

 reduction reactions or the chemical energy of 'high energy' phosphate bonds 

 (photosynthetic phosphorylation). 



It is to be expected that reactions so intrinsically a part of the cell's being would 

 have their characteristics determined by the fact that the components of the reac- 

 tions appear to be part of a highly-organized and definite structure, and not freely 

 in solution subject to classical kinetics. Here again surprisingly little information 

 is available. Yet an awareness of the effect of a heterogeneous milieu is of para- 

 mount importance if we wish to appreciate in full the activities and potentialities 

 of the cell. 



It is gratifying to note that while these problems are as yet far from being 

 understood, many of the papers in this symposium are directly concerned with 

 them, and through ingenious experiments a great deal of new knowledge has been 

 brought forth bearing on these questions. To this extent it is hoped that this 

 volume will be of benefit to all those who consider themselves students of the cell. 



I should like to express my appreciation to Dr. William D. McElroy, Dr. Eric G. 

 Ball, and Dr. Van R. Potter for having served as chairmen in the three sessions 

 of the symposium, which they did with skill and discretion. My appreciation is 

 also extended to the administration and staff of the Marine Biological Laboratory 

 for their unfailing cooperation and efforts to make the meeting a success. Finally, 

 my thanks go to Mr. Robert Kitchen and Miss Lillian Blaschke for serving as 

 volunteer messengers during the symposium, and to Mrs. Sally Hayashi and the 

 staff of the American Physiological Society, who deserve the major credit for 

 the editing and assembling of this volume. 



Teru Hayashi 

 February, ig^g 



