Symposium on metabolism of inorganic compounds. IV. Hydrogen photosynthesis and alternative metabolic pathways in photosynthetic bacteria.

II. Photoreduction of Carbon Dioxide with Molecular Hydrogen............................... III. Photometabolism of Organic Compounds................................................. A. Photoproduction of Molecular Hydrogen............................................... B. The Stoichiometry of Hydrogen Production............................................ C. An Anaerobic Light-dependent Citric Acid Cycle....................................... D. C02 Fixation during Photometabolism of Citric Acid Cycle Intermediates............... E. Alternative Pathways of Carbon Metabolism ......................................... IV. Functions of the Accessory Electron Donor in Bacterial Photosynthesis; Alternative Pathways of Electron Transfer................................................................ V. Concluding Remarks..................................................................... VI. Addendum. . ............................................................................. VII. Literature Cited............... ...............................