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  • 1
    Electronic Resource
    Electronic Resource
    Interaction of fatty acids with the calcium-magnesium dependent adenosine triphosphatase from sarcoplasmic reticulum (1982)
    s.l. : American Chemical Society
    Biochemistry 21 (1982), S. 6441-6446 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00268a019
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  • 2
    Electronic Resource
    Electronic Resource
    Interactions of pyrene derivatives with lipid bilayers and with calcium-magnesium ATPase (1985)
    s.l. : American Chemical Society
    Biochemistry 24 (1985), S. 2195-2202 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00330a013
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of lipids and long-chain alkyl derivatives on the activity of calcium-magnesium ATPase (1986)
    s.l. : American Chemical Society
    Biochemistry 25 (1986), S. 7544-7552 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00371a043
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  • 4
    Electronic Resource
    Electronic Resource
    The oxidation and reduction of pyridine nucleotides by Rhodopseudomonas spheroides and Chlorobium thiosulfatophilum (1970)
    Springer
    Archives of microbiology 72 (1970), S. 48-59 
    Details
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The light-induced formation of NADH by whole cells of Rhodopseudomonas spheroides has been followed fluorimetrically and found to lag slightly behind cytochrome c oxidation. The uncoupler, FCCP1, abolished NADH formation which was also inhibited by HOQNO1. Electron flow from NADH to oxygen or cytochrome c was inhibited in chromatophores of R. spheroides by HOQNO, antimycin A and rotenone. From the known properties of the inhibitors used it is deduced that NADH formation in the light is dependent upon reversed electron flow. No light-induced formation of NAD(P)H by whole cells or chromatophores of Chlorobium thiosulfatophilum was detected either fluorimetrically or by extraction followed by enzymic assay although cytochrome c oxidation was extensive in whole cells. Extracts of C. thiosulfatophilum catalysed the rapid reduction of endogenous or mammalian cytochrome c; unlike R. spheroides this activity was found almost entirely in the soluble fraction and was insensitive to HOQNO, antimycin A and rotenone. No cytochrome b was detected in C. thiosulfatophilum by difference spectroscopy of pyridine haemochromes of acetone powders. The K m for NADH of NADH-cytochrome c reductase in both organisms was about 3 μmol; the reductase was inhibited by NAD. The rates of NADPH-cytochrome c reductase in R. spheroides particles were too low for K m determination; for C. thiosulfatophilum particles the K m for NADPH was about 300 μmol. The addition of NADH to soluble extracts of either organism caused the reduction of endogenous flavin that was reoxidised by ferricyanide. The NADH-cytochrome c reductase of C. thiosulfatophilum was not separated from ferredoxin on a DEAE column. It is concluded that in C. thiosulfatophilum the formation of NADH in an energy-linked reaction is unlikely; the possibility of a cyclic electron flow involving chlorophyll, ferredoxin, flavoprotein and cytochrome c is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00411014
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  • 5
    Electronic Resource
    Electronic Resource
    Oxidation of Hydroxylamine in Cell-Free Extracts of Nitrosomonas Europaea (1960)
    [s.l.] : Nature Publishing Group
    Nature 185 (1960), S. 512-514 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WE have prepared cell-free extracts of Nitroso-monas that will oxidize hydroxylamine to nitrite provided a suitable acceptor such as cyto-chrome c or phenazine methosulphate is added to the extract or to protein fractions prepared from it. Since this is probably the first report of a cell-free ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/185512a0
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  • 6
    Electronic Resource
    Electronic Resource
    Uptake of Amino-Acids by the Fungus Botrytis Fabae (1962)
    [s.l.] : Nature Publishing Group
    Nature 194 (1962), S. 947-948 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE active accumulation of amino-acids has been intensively studied in bacteria1-3 and animal cells4'5. Active transport of amino-acids in yeasts has been described6'7 ; but in the fungi generally information on the mechanism of action and specificity of the uptake process is slight. A study of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/194947a0
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  • 7
    Electronic Resource
    Electronic Resource
    Geological Features of the Sites of the Sligo Implements (1928)
    [s.l.] : Nature Publishing Group
    Nature 121 (1928), S. 861-862 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] AT intervals from August 1927 to March 1928 there appeared in NATURE a series of letters relating to the discovery of chipped fragments of limestone by Mr. J. P. T. Burchell in the neighbourhood of Sligo. These were claimed by him to be evidence of Palæolithic man in Ireland. Apart from the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/121861a0
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  • 8
    Electronic Resource
    Electronic Resource
    In the Yellowstone with Princeton (1929)
    [s.l.] : Nature Publishing Group
    Nature 123 (1929), S. 852-855 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN the issue of NATURE of Nov. 5, 1927, Mr. E. B. -^ Bailey gave a brief account of the ' Summer School of Geology and Natural Resources', which has been organisad by Prof. B. M. Field, of the University of Princeton, N.J. I was privileged last summer to be the guest of the Summer School in a tour ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/123852a0
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  • 9
    Electronic Resource
    Electronic Resource
    Activity of 2-Trifluoromethylbenzimidazoles as Uncouplers of Oxidative Phosphorylation (1965)
    [s.l.] : Nature Publishing Group
    Nature 208 (1965), S. 1169-1170 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE herbicidal and insecticidal properties of a series of substituted benzimidazoles have been described by Burton et al.1. These compounds are derivatives of 2-trifluoromethylbenzimida.zole: and are related in structure to 4,5,6,7-tetrachlorobenz-triazole, a compound investigated at these ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2081169a0
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  • 10
    Electronic Resource
    Electronic Resource
    The light-induced development of nitrate reductase in etiolated barley shoots: An inhibitory effect of laevulinic acid (1977)
    Springer
    Planta 137 (1977), S. 77-84 
    Details
    ISSN: 1432-2048
    Keywords: Enzyme induction ; Greening ; Hordeum ; Laevulinic acid ; Nitrate reductase ; Protohaem
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Induction of nitrate reductase EC 1.6.6.1 in etiolated barley (Hordeum vulgare L., var. Proctor) required continuous illumination and showed a lag period of about three hours. During the first 16 h of illumination the ratio NADH/NAD and NADPH/NADP, taken as a measure of internal oxidation reduction potential, declined. The inhibitor DCMU applied to whole leaves at concentrations shown to inhibit the reduction of cytochrome f by Photosystem 2 light did not inhibit the induction of nitrate reductase nor did it diminish the ratio of reduced to oxidised puridine nucleotides in the early hours of greening. It was concluded that light driven electron flow was not necessary for nitrate reductase induction. Chloramphenicol gave a slight inhibition of nitrate reductase induction. Laevulinic acid was added to greening barley leaves to inhibit tetrapyrrole pigment biosynthesis and plastid development. It strongly inhibited chlorophyll synthesis and nitrate reductase induction, with relatively little effect upon Photosystem 1 and 2 activities in isolated plastids. The activities of other inducible enzymes and control enzymes were little affected by laevulinic acid. Laevulinic acid also inhibited nitrate reductase induction by added nitrate in fully-greened illuminated plants grown in nitrate-free medium and so is unlikely to be acting through inhibition of plastid development. This inhibitor lowered the level of protohaem in whole leaves and plastids of greening barley and it is postulated that it may diminish the protohaem available for the assembly of a cytochrome b component of nitrate reductase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00394439
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