194 METABOLISM AND PHYSIOLOGY 



14. Bishop, N. I., The reactivity of a naturally occurring quinone (Q-255) in 

 photochemical reactions of isolated chloroplasts. Proc. Natl. Acad. Sci . U. 

 S., 45, 1696 (1959). 



15. Arnon, D. I., and Horton, A. A., Site of action of plastoquinone in the elec- 

 tron transport chain of photosynthesis. Acta Chem. Scand. 17., S135 (1963). 



16. Muller, F. M., On the metabolism of the purple sulfur bacteria in organic 

 media. Arc/z. Mikrobiol., 4, 131 (1933). 



17. Losada, M., Nozaki, M., and Arnon, D. I., Photoproduction of molecular hy- 

 drogen from thiosuKate by C/?ro;;?«^/?o^? cells, p. ^lOmASymposium on Light 

 and Life (W. D. McElroy and B. Glass, eds.). Johns Hopkins Press, Balti- 

 more, 1961. 



18. Arnon, D. I., Losada, M., Nozaki, M., and Tagawa, K., Photoproduction of 

 hydrogen, photofixation of nitrogen and a unified concept of photosynthesis. 

 Nature, 190, 601 (1961). 



19. Frenkel, A. W., Reflections on recent theories, concerning the mechanism 

 of bacterial photosynthesis, p. 587 in A Symposium on Light and Life (W. 

 D. McElroy and B. Glass, eds.). Johns Hopkins Press, Baltimore, 1961. 



20. Vernon, L. P., and Ash, O. K., The photoreduction of pyridine nucleotides 

 by illuminated chromatophores of Rhodospirillum rubrum in the presence 

 of succinate. J. Biol. Chem., 234, 1878 (1959). 



21. Vernon, L. P., and Ash, O. K., Coupled photooxidation and photoreduction 

 reactions and associated phosphorylation by chromatophores of Rhodo- 

 spirillum rubnim. J. Biol. Chem., 235, 2721 (1960). 



22. Nozaki, M., Tagawa, K., and Arnon, D. I., Noncyclic photophosphorylation 

 in photosynthetic bacteria. Proc. Natl. Acad. Sci. U. S., 47, 1334 (1961). 



23. Bose, S. K., and Gest, H., Bacterial photophosphorylation: regulation by 

 redox balance. Proc. Natl. Acad. Sci. U. S., 49, 337 (1963). 



24. Arnon, D. I., Allen, M. B., and Whatley, F. R., Photosynthesis by isolated 

 chloroplasts. IV. General concept and comparison of three photochemical 

 reactions. Biochim. Biophys. Acta, 20, 449 (1956). 



25. Hagihara, B., and Lardy, H. A., A method for the separation of orthophos- 

 phate from other phosphate compounds. J. Biol. Chem., 235, 889 (1960). 



26. Horio, T., and Kamen, M. D., Optimal oxidation-reduction potentials and 

 endogenous cofactors in bacterial photophosphorylation. Biochemistry, 1, 

 144 (1962). 



27. Tagawa, K., and Arnon, D. I., Ferredoxins as electron carriers in photo- 

 synthesis and in the biological production and consumption of hydrogen gas. 

 Nature, 195, 537 (1962). 



28. Shin, M., Hamuro, Y., and Okunuki, K., Studies on codehydrogenase. II. An 

 improved method for the preparation of diphosphopyridine nucleotide from 

 baker's yeast using ion exchange resin. J. Biochem. (Japan), 48,579 (1960). 



