Page 



Fluorescence in Two-Pigment Systems 122 



J. L. Rosenberg and Tevfik Bigat 



Relationship between Light Induced EPR Signal and 



Pigment P700 131 



Helmut Beinert and Bessel Kok 



EPR and Optical Studies on Scenedesmus Mutants 138 



Ellen C. Weaver and Norman I. Bishop 



A Method for Calculating Quantum Yields for the 



Formation of Reaction Intermediates 147 



Daniel Rubinstein 



Light-Induced Rapid Absorption Changes During 

 Photosynthesis. II. 430 m^ Absorption Changes in 



Aged Chloroplasts in the Presence of PMS and Ascorbate .... 153 

 Bacon Ke 



II. ELECTRON TRANSPORT PATHS - BIOCHEMICAL 

 INVESTIGATIONS 



The Electron Transport System of Photosynthesis 

 Deduced from Experiments with Mutants of 



Chlamydomonas Reinhardi 158 



R. P. Levine 



Effects of Quinones and Oxygen in the Electron 



Transport System of Chloroplasts 174 



Achim Trebst, Herbert Eck and Sieglinde Wagner 



Photosynthetic Electron Trcinsport and Phosphorylation 195 



Daniel I. Arnon 



Characteristics of Tritium Incorporation into 



Illuminated Chloroplasts 213 



Brian Colman and Wolf Vishniac 



Indophenol Dyes: Catalysts and Uncouplers of 



Photophosphorylation 219 



Donald L. Keister 



Photosynthetic Phosphorylation in the Presence of 



Naturally Occurring Substances 228 



C. C. Black and A. San Pietro 



Characterization of Allagochrome and its Biosynthesis 



in Leaf Extracts 235 



Helen M. Habermann 



