522 SUBJECT INDEX 



DPIP: reduction by hydrogen, 145; reversal of antimycin A inhibition of cyclic 

 photophosphorylation. 140 



DPIPH2: effect on ESR signal, 345; photooxidation, 235-265 



Difference spectra: see Absorbancy changes 



Electron flow: cyclic, 369; noncyclic, 139, 177; effect of viscosity, 359 



Electron spin resonance signal: Cps. (?^/o7/c»;», 351; effect of additions, 344; kinetics, 

 340. 345; redox titration, 337; R. rub)'ni)i, 338, 343; temperature effect, 340 



Electron transport: cytochromes, 285; flavoproteins, 196: hypothetical scheme, 301; 

 light- activated, mechanisms, 357; and phosphorylation reactions, 195; rates, 371; 

 R. rubrnm. 275, 301 



Emission spectra, fluorescence: chlorophyll- 770 complex, 426; Cps. ethylicum, 414, 

 416 



Energy transfer: efficiency, 390, 395, 415; mechanisms, 390, 395; and phosphorylation, 

 speculative scheme, 308; relation to cytochrome oxidation, 413; temperature 

 effect, 391 



Ferredoxin: 324 



Fluorescence: bacteriochlorophyll, 389, 390; bacteriopheophytin, 389, 390; see also 

 Emission spectra 



Heme proteins: 61; catalase, 65; cytochrome b, 65; cytochrome c, 64; cytochrome o, 

 66; cytochromoids, 66; peroxidases, 65: properties and functions, 63; structural 

 classification, 62 



Hydrogen metabolism: 137; reduction of dyes in light and dark, 145 



Iron deficiency in porphyrin synthesis: 41 



Iron proteins: amino acid composition, 320; Chroi)iatii())i, 315; and chromatophores, 

 interaction, 321; nonheme, 315; properties, 319; spectroscopic properties, 317; 

 see also Ferredoxin 



Light intensity, effect of: Chromatium strain D, 82 



Membrane fractions: Chromatins and/?, ntbruin, 101 



Metabolism: 129, 175; autoheterotrophic, 131; carbon, 130; effect of nutritional con- 

 ditions, 133; nitrogen, 134 



Nitrogen metabolism, relation to carbon metabolism: 134 



Oxygen production, lack of: 137 



Phosphodoxin: 223 



Phosphorylation, aerobic: inhibitors, 171; kinetics, 170; related enzymatic activities, 

 164; system of R. rnbru»i, 161 



Photoautotrophy, biochemical basis: C. thiosidfatopliiliiiii, 151 



Photooxidation: bacteriochlorophyll, 348; ferrocyanide, 240; methylene blue, 239; 

 see also Cytochrome photooxidation 



Photooxidation of DPIPH,: coupled to endogenous quinone, 246; effect of FMN, 249; 

 effect of quinacrine, 249; heat stability, 252; Rps. splicroides, 245 



Photophosphorylation: ATP per flash. 206; C. thiosidfatophUii))!, 77; cofactor, phos- 

 phodoxin, 223; coupled with photosynthetic electron transport system, 292; coupling 

 to electron transfer, 198; effect of cytochrome c,, 292; effect of PMS, 293; effect 

 of pyrophosphate, 295; effect of riboflavin. 294; effect of UQ2 , 217; effect of valino- 

 mycin, 198; flashing light studies, 202; inhibitors, 300; light-induced and dark 

 steps, 201; redox state of chromatophore components, 140, 188, 191, 217, 220; 

 R. nibriDii. 175, 195; role of bound ADP in, 298; sites, 217 



Photophosphorylation, cyclic: 175, 179, 191; effect of aging and heat treatments, 180; 

 effect of ascorbate, 181, 191; effect of DPNH,, 182; effect of uncoupling agents, 

 146; inactivation by pretreatment with salt, 179; inhibition by antimycin A, 140; 

 inhibition by dyes, 182; light intensity, 211 



Photophosphorylation, delayed: effect of HOQNO, MPM and temperature, 204 



Photophosphorylation, noncyclic: 175, 185, 191; alternate explanation, 139; DPN 

 dependence, 188; effect of aging, 190; requirement for electron donor and acceptor, 

 185; stoichiometry. 187 



Photophosphorylation. rates: 202; comparison, 208; R. »iolischianum chromato- 

 phores, 111 



Photopigment synthesis, Rps. spheroides: 53 



