[hydrogen excretion and carbon assimilation by purple bacteria in relation to light intensity]. 19685747211
characteristics of a light-dependent proton transport in cells of rhodospirillum rubrum. 19695763412
light-induced reactions of p890 and p800 in the purple photosynthetic bacterium rhodospirillum rubrum. 19695763418
the effects of phenazine dyes and n,n,n',n'-tetramethyl-p-phenylenediamine upon light-induced absorbance changes and photophosphorylation in rhodospirillum rubrum extracts. 19695769193
biosynthesis of bacterial glycogen. vii. purification and properties of the adenosine diphosphoglucose pyrophosphorylase of rhodospirillium rubrum. 19695769989
three spectrally different states of cytochromes cc' and c' and their interconversion. 19695771952
photosynthesis in rhodospirillum rubrum. iv. isolation and characterization of ribulose 1,5-diphosphate carboxylase. 19695792651
the morphogenesis of the bacterial photosynthetic apparatus. 3. the features of a pheophytin-protein-carbohydrate complex excreted by the mutant m 46 of rodospirillum rubrum. 19695792867
bacteriochlorophyll pheophytinization in chromatophores and subchromatophores from rhodospirillum rubrum. 19695795475
photosynthetic electron transport induced by flashing light in the purple photosynthetic bacterium rhodospirillum rubrum. 19695795477
uracil incorporation and photopigment synthesis in rhodospirillum rubrum. 19695795482
circular dichroism of cytochrome cc' and cytochrome c'. 19695804880
effects of ionophorous antibiotics on the light-induced internal and external hydrogen ion changes and phosphorylation in bacterial chromatophores. 19695805287
the dehydrogenation sequence leading to coloured carotenoids in photosynthetic bacteria. 19695807197
new pathways of methoxy carotenoid formation in rhodospirillum rubrum. 19695807199
rhodospirillum tenue sp. n., a new species of the purple nonsulfur bacteria.rhodospirillum tenue sp. n. differs from the rhodospirilla described so far by its small size, ultrastructure, and physiological and biochemical characteristics.19695808083
metabolism of poly-beta-hydroxybutyrate. ii. enzymatic synthesis of d-(-)-beta hydroxybutyryl coenzyme a by an enoyl hydrase from rhodospirillum rubrum. 19695808333
structure and function of chloroplast proteins. 8. some properties of ribulose-1,5-diphosphate carboxylase of athiorhodaceae in comparison with those of plant enzyme. 19695816149
dissociation-produced loss of regulatory control of homoserine dehydrogenase of rhodospirillum rubrum. i. factors which affect the interconversion of the regulatable and nonregulatable states. 19695820667
dissociation-produced loss of regulatory control of homoserine dehydrogenase of rhodospirillum rubrum. ii. some properties of the regulatable and nonregulatable forms. 19695820668
cytochrome photooxidation at liqud nitrogen temperatures in photosynthetic bacteria. 19695822417
low potential titration of the fluorescence yield changes in photosynthetic bacteria. 19695822422
bromothymol blue and bromocresol purple as indicators of ph changes in chromatophores of rhodospirillum rubrum. 19695823098
on the use of bromthymol blue as an indicator of internal ph changes in chromatophores from rhodospirillum rubrum. 19695823935
adenosyl-methionine incorporation into the methoxylated carotenoids in chromatophores of rhodospirillum rubrum. 19655831103
glutamic acid synthesis from acetate units and bicarbonate in extracts of photosynthetic bacteria. 19645836544
photoassimilation of acetate and the biosynthesis of amino acids by chlorobium thiosulphatophilum. 19645840715
acetate and bicarbonate metabolism in photosynthetic bacteria. 19655842696
depletion of k+ in rodospirillum. 19655852112
metabolic connection between oxalacetate and glutamate in rhodospirillum rubrum. 19655858052
ubiquinone concentrations in athiorhodaceae grown under various environmental conditions.1. the nature and concentration of ubiquinone in six species of athiorhodaceae have been examined after growth under aerobic and photosynthetic conditions. 2. increase in ubiquinone concentration during adaptive synthesis of photosynthetic pigments by rhodopseudomonas spheroides incubated under low-aeration conditions was observed. 3. the nature of the carbon source was found to have a marked effect on ubiquinone, as well as bacteriochlorophyll, concentrations.19655862408
reaction of gramicidin with bacterial chromatophores. 19655864023
the formation of a quencher of the fluorescence of chromatophores from photosynthetic bacteria. 19655864031
the photosynthetic apparatus of rhodospirillum varying the light intensity and temperature during growth it is possible to obtain cultures of rhodospirillum molischianum in which the specific bacteriochlorophyll contents differ by as much as fivefold. we used such cultures to compare the changes in the electron microscopic appearance of the cells with the changes in the amount and bacteriochlorophyll content of chromatophore material isolated from cell extracts. the cells contained a variable number of internal membranes which are invagin ...19655865931
effect of diquat (1,1'-ethylene-2,2'-dipyridylium dibromide) on the photosynthetic growth of rhodospirillum rubrum.diquat (2 x 10(-4)m) inhibited both aerobic and anaerobic growth of rhodospirillum rubrum. with photosynthetic cultures, diquat affected the synthesis of bacteriochlorophyll more readily than cell mass (turbidity). diquat retarded the synthesis of bacteriochlorophyll and some protein more readily than that of other cellular constituents such as ribonucleic acid, deoxyribonucleic acid, and cell mass. with cells deficient in phosphate, diquat inhibited the uptake-conversion of inorganic phosphate ...19655866040
the lipids and fatty acid metabolism of photosynthetic bacteria. 19655867688
the pyruvate phosphoroclastic reaction in chromatium. a probable role for ferredoxin in a photosynthetic bacterium. 19645871813
absorption changes in bacterial chromatophores. ii. a new chlorophyll-like pigment from the oxidation of chromatophores from rhodospirillum rubrum. 19655873425
a new isolate of the rhodospirillum fulvum group and its photosynthetic pigments. 19655883128
the synthesis of phosphoendolpyruvate from pyruvate and atp by extracts of photosynthetic bacteria. 19665911083
the possible role of quinone methines in phosphorylation reactions in rhodospirillum rubrum and liver mitochondria. 19665911279
complete fractionation of bacteriochlorophyll and its degradation products. 19665912015
thiosulphate metabolism and rhodanese in chromatium sp. strain d. 19665915368
photophosphorylation in presence and absence of added adenosine diphosphate in chromatophores from rhodospirillum rubrum. 19665933524
synthesis and possible character of a high-energy intermediate in bacterial photophosphorylation.1. in photophosphorylation with chromatophores from rhodospirillum rubrum, evidence is presented for the synthesis of activated precursors of atp in the energy-conversion system coupled to photosynthetic electron transport. 2. a significant amount of atp is synthesized when a reaction mixture containing chromatophores and adp is illuminated and then incubated with p(i) in the dark. atp is not synthesized to an appreciable extent, either when a reaction mixture containing chromatophores and p(i) ...19665938657
light-induced dark [32p]adenosine triphosphate formation by rhodospirillum rubrum chromatophores. adenosine triphosphate-inorganic phosphate exchange activity. 19665938951
a procedure for the preparation of extracts from rhodospirillum rubrum catalyzing n2 reduction and atp-dependent h2 evolution. 19665941206
bacterial photophosphorylation in the absence of added nucleotide. a second intermediate stage of energy transfer in light-induced formation of atp. 19665944772
kinetic analysis of the reaction of cytochrome cc' with carbon monoxide. 19665946624
biosynthesis of glutamate in photosynthetic bacteria. 19665947892
kinetic studies on the oxidase systems of photosynthetic bacteria. 19665947895
inhibition studies of photophosphorylation by rhodospilillum rubrum chromatophores with particular concerns to antimycin-resistant photophosphorylation in the presence of artificial electron carriers. 19665947901
kinetics of light-induced absorbance changes in rhodospirillum rubrum extracts. 19665961081
early chemical events in photosynthesis: kinetics of oxidation of cytochromes of types c or f in cells, chloroplasts, and chromatophores. 19665966902
chlorophyll-chlorophyll interactions. 19665966912
the photosynthetic apparatus in chloroplasts of higher plants. 19665966916
absorption characteristics of bacteriochlorophyll types in purple bacteria and efficiency of energy transfer between them. 19665966925
the bacterial photosynthetic reaction center. 19665966926
primary photosynthetic reactions in relation to transfer of excitation energy. 19665966927
kinetics of p-870 absorbance changes induced in rhodospirillum rubrum chromatophores by laser flashes. 19665966930
satellite dna in photosynthetic bacteria. 19665967242
light-induced intravesicular ph changes in rhodospirillum rubrum chromatophores. 19665971736
effect of diqiuat (1,1'-ethylene-2,2'-dipyridylium dibromide) on the formation and photoreactions of chromatophores from rhodospirillum rubrum. 19665971848
absorption bands of bacteriochlorophyll types in purple bacteria and their response to illumination. 19665971850
purification and properties of a d(--)-beta-hydroxybutyric dimer hydrolase from rhodospirillum rubrum. 19665972339
the light-induced, reversible ph change in chromatophores from rhodospirillum rubrum. 19665972824
2-multiprenylphenols and 2-decaprenyl-6-methoxyphenol, biosynthetic precursors of ubiquinones. 19665980878
spherical subunits in photosynthetic membranes of two cyanophyceae and the bacterium rhodospirillum rubrum. 19665998094
correlation of light-induced absorbance changes with photo-phosphorylation in rhodospirillum rubrum extracts. 19676016332
isolation and characterization of glycolipids from some photosynthetic bacteria.glycosyl glycerides have been found in substantial amounts in chloropseudomonas ethylicum but could not be detected in two strains of rhodopseudomonas palustris. rhodospirillum molischianum possibly contains small amounts of monoglycosyl diglyceride. the glycolipids of c. ethylicum have been separated into two components. one of these, glycolipid i, is a monogalactosyl diglyceride. glycolipid ii, upon acid hydrolysis, yields galactose, rhamnose, and a third, unidentified sugar. the glycolipids o ...19676025299
regulation of glutamine synthetase. ii. patterns of feedback inhibition in microorganisms.the feedback inhibition of glutamine synthetase was investigated by use of partially purified enzyme preparations from salmonella typhimurium, micrococcus sodonensis, pseudomonas fluorescens, bacillus cereus, bacillus licheniformis, clostridium pasteurianum, rhodospirillum rubrum, neurospora crassa, candida utilis, and chlorella pyrenoidosa. inhibition analyses indicated that the enzyme of each organism can be effectively regulated with mixtures of end products from the diverse pathways of gluta ...19676025412
light-induced interactions of rhodospirillum rubrum chromatophores with bromothymol blue. 19676025556
biosynthesis of phenylalanine from phenylacetate by chromatium and rhodospirillum rubrum.cultures of chromatium strain d and rhodospirillum rubrum incorporated (14)c from phenylacetate-1-(14)c during anaerobic growth. the radioactivity in the protein fraction of cells was mainly in phenylalanine. phenylalanine from chromatium cells grown in phenylacetate-1-(14)c was labeled at carbon 2. incorporation of phenylacetate by chromatium was decreased in the presence of exogenous phenylalanine, and de novo synthesis of phenylalanine from bicarbonate was less in medium containing either phe ...19676032506
basal organelles of bacterial flagella.liberated by enzymatic lysis of the cells, the flagella of rhodospirillum rubrum, r. molischianum, and r. fulvum all have a similar structure. the hook at the base of the flagellum is connected by a short, narrow collar to a paired disc in the basal organelle. this paired disc is in turn connected to a second paired disc. the disposition of flagella to which fragments of the cell membrane still adhere suggests that the narrow collar at the base of the hook traverses both the wall and the membran ...19676039362
photosynthesis in rhodospirillum rubrum. i. autotrophic carbon dioxide fixation.the incorporation and distribution of activity from (14)co(2) was investigated under autotrophic conditions in the facultative photoautotroph, rhodospirillum rubrum, with cells cultured on hydrogen, carbon dioxide, and ammonium sulfate. in 1 second (14)co(2) fixation experiments essentially all of the activity was found in 3-phosphoglyceric acid: plotted against time percent incorporation into phosphate esters has a strikingly negative slope. these results suggest that under autotrophic conditio ...19676042357
photosynthesis in rhodospirillum rubrum. ii. photoheterotrophic carbon dioxide fixation.the contribution of the reductive pentose phosphate cycle to the photometabolism of carbon dioxide and to carbon metabolism in rhodospirillum rubrum grown photoheterotrophically with l-malate as the carbon source is nil, unlike autotrophically grown r. rubrum. glycolic acid appears to be the first stable product of co(2) fixation in r. rubrum cultured photoheterotrophically on l-malate. the results obtained in (14)co(2) fixation experiments suggest that the photometabolism of co(2) through glyco ...19676042358
photosynthesis in rhodospirillum rubrum. 3. metabolic control of reductive pentose phosphate and tricarboxylic acid cycle enzymes.enzymes of the reductive pentose phosphate cycle including ribulose-diphosphate carboxylase, ribulose-5-phosphate kinase, ribose-5-phosphate isomerase, aldolase, glyceraldehyde-3-phosphate dehydrogenase and alkaline fructose-1,6-diphos-phatase were shown to be present in autotrophically grown rhodospirillum rubrum. enzyme levels were measured in this organism grown photo- and dark heterotrophically as well. several, but not all, of these enzymes appeared to be under metabolic control, mediated b ...19676042359
pigment-protein complexes derived from rhondospirillum rubrum chromatophores by enzymatic digestion. 19676048851
a factor from spinach leaves interacting with chlorophylls. 19676048856
observations on the changes in ultraviolet absorbance caused by succinate and light in rhodospirillum rubrum. 19676048858
bacilliform mutants of rhodospirillum rubrum. 19676049520
identification of pteridines produced by three species of photosynthetic bacteria. 19676049523
light-induced rapid absorption changes during photosynthesis. 8. cytochrome and bacteriochlorophyll reactions in rhodospirillum rubrum cells. 19676049953
decline in bacteriochlorophyll fluorescence induced by carotenoid absorption. 19676049957
light-induced electron transfer reactions and adenosine triphosphate formation by rhodospirillum rubrum chromatophores. 19676052446
carotenoid biosynthesis in rhodospirillum rubrum: effect of pteridine inhibitor.a known inhibitor of pteridine utilization (4-phenoxy,2,6-diamino pyridine) blocks the synthesis of colored carotenoids in the photosynthetic bacterium rhodospirillum rubrum. in many ways the effect is similar to the inhibition of the synthesis of colored carotenoids by diphenylamine. this inhibition is probably independent of other effects of pteridine on photosynthetic electron transport since it is not as readily reversible as the total inhibition of photosynthetic activity by pteridine analo ...19676054162
the use of spectrophotometry in an ecological investigation of the facultatively anaerobic purple photosynthetic bacteria. 19676054684
new multiprenylquinones in the biosynthesis of ubiquinone. 19676055159
ornithine-containing lipid in rhodospirillum rubrum. 19676055208
an electrophoretic study of the heme proteins of some photosynthetic bacteria. 19676058130
observations on the biosynthesis of phytoterpenoid quinone and chromanol nuclei.1. p-hydroxy[u-(14)c]benzoic acid, except for loss of the carboxyl group, is effectively incorporated into the nucleus of ubiquinone and an unidentified prenylphenol by maize roots, maize shoots, french-bean leaves, french-bean cotyledons and ochromonas danica. plastoquinone, alpha-tocopherol, gamma-tocopherol and alpha-tocopherolquinone are all unlabelled from this substrate. the high radioactivity of the prenylphenol and its behaviour in a pulse-labelling experiment with maize shoots suggested ...19676060446
new epoxyubiquinones. 19676073044
oxido-reduction of b800-850 and b880 holochromes isolated from three species of photosynthetic bacteria as studied by electron-paramagnetic resonance and optical spectroscopy.certain redox properties of bacteriochlorophyll alpha were used to probe the structure of several light-harvesting pigment-protein complexes or holochromes. to attribute redox properties unequivocally to a given holochrome, we worked with purified holochromes. we developed purification procedures for the b880 holochromes from rhodospirillum rubrum, rhodopseudomonas sphaeroides and ectothiorhodospira sp. and for the b800-850 holochromes from the latter two species. in all these holochromes, bacte ...19846086349
influence of cyclic amp on photosynthetic development in rhodospirillum rubrum.during o2-free growth in the light and in medium with pyruvate, rhodospirillum rubrum exhibits diauxic growth. the cells first fermented pyruvate and afterwards photometabolized. exogenous cyclic amp acted to prolong the lag period between fermentative and photosynthetic development, as well as to slow the light-dependent growth rate. this observation, and in situ changes in the cyclic amp levels in cells undergoing biphasic growth, suggested that the cyclic nucleotide was involved in photosynth ...19846086589
cytochromes c' in their reaction with ethyl isocyanide.the binding of ethyl isocyanide (eic) to a representative number of cytochromes c' is demonstrated. spectroscopic and equilibrium constants have been measured and compared for the binding of eic to cytochromes c' from the photosynthetic bacteria chromatium vinosum, rhodopseudomonas palustris, rhodospirillum rubrum, and rhodopseudomonas sphaeroides. while the absorption spectra of the eic complexes resemble those of eic complexes of other high-spin hemoproteins, the soret half band widths and ext ...19846087877
a new crystal form and preliminary crystallographic data for ferricytochrome c' from rhodospirillum rubrum.a new crystal form of ferricytochrome c' from the photosynthetic bacteria, rhodospirillum rubrum, has been obtained by dialysing protein solution against polyethylene glycol 4000. the crystals belong to the space group p61 (or its enantiomorph p65) with unit cell dimensions: a = b = 51.63 a and c = 155.39 a. the asymmetric unit contains one dimer molecule of 28,000 molecular weight and the solvent content of the unit cell is approximately 38%.19846090675
electron-transfer reactions of photoreduced flavin analogues with c-type cytochromes: quantitation of steric and electrostatic factors.we have found correlations between rate constants and the difference in redox potential of the reactants for electron-transfer reactions between oxidized cytochromes and either photoproduced riboflavin or flavin mononucleotide (fmn) semiquinones (the latter rate constants extrapolated to infinite ionic strength). the riboflavin-cytochrome rate constants are about 70% of those for reduction by lumiflavin, probably because of steric interference by the ribityl side chain. reduction of cytochromes ...19846093864
[delayed bacteriochlorophyll luminescence and the primary stages of electron transport in photosynthetic reaction centers of purple bacteria].the results of studies of charge separation in photosynthetic reaction centers of purple bacteria are summarized. the findings concerning the sequence of initial steps of the electron transfer and properties of the electron carriers obtained by direct methods of differential optical absorption and esr spectroscopy are compared with the data on the bacteriochlorophyll delayed fluorescence resulting from reversal of charge separation. the data analysis gives an integrated description of the reacti ...19846095028
evaluation of the complexity of charge recombination kinetics in photosynthetic bacteria. 19846095340
changes in the regulatory form of rhodospirillum rubrum nitrogenase as influenced by nutritional and environmental factors.the photosynthetic bacterium rhodospirillum rubrum regulates the activity of its nitrogenase (n2ase) by interconverting the enzyme into three distinct enzymatic species: n2ase a (a fully active form) and two regulatory forms, n2ase ractive and n2ase rinactive. n2ase r is distinguished from n2ase a in vitro by the requirement of its fe protein for activation by a mn2+-dependent activating factor. n2ase is converted from the a to the r form in response to certain environmental factors such as carb ...19806103895
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