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1978[X]
41Author    Manfred GrieshaberRequires cookie*
 Title      
  Reference    Z. Naturforsch. 33c, 235 (1978); received December 30 1977/February 21 1978 
  Published    1978 
  Keywords    Oligocephalic Enzymes, Enzyme Purification, Glutamine-Chorismate-Amidotransferase-Free Anthranilate Phosphoribosyltransferases, Subunit Assembly, Enzyme Evolution 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0235.pdf 
 Identifier    ZNC-1978-33c-0235 
 Volume    33 
42Author    D. W. Erner, R. StripfRequires cookie*
 Title    Differentiation of Rhizobium japonicum, I. Enzymatic Comparison of Nitrogenase Repressed and Derepressed Free Living Cells and of Bacteroids  
 Abstract    Derepressed free living cells of Rhizobium japonicum strain 61-A-101 with leucine as single nitrogen source develop a maximum nitrogenase activity of 180 nmol C2H4-mg protein-1 -h _1 in liquid culture under 2% 0 2 in the gas phase. Only \0% of this activity is found with no oxygen in the gas phase during a 90 min incubation period. The maximum activity under 2% oxygen in the gas phase is unaffected by addition of 1 —100 m M NH4+ and by addition of low concentrations of glutamine (0.36 —1.44 m M) . Specific activities of alanine dehydrogenase (E.C. 1.4.1.1.) aspartate aminotransferase (E.C. 2.6.1.1.) and, with much lower activities, of GOGAT (E.C. 1.4.1.13) in nitrogenase active free living cells are more similar to bacteroids than to nitrogenase repressed free living cells from liquid culture. The activities in nitrogenase repressed cells were about 50% lower. Glutamine synthetase (E.C. 6.3.1.2.) activity in bacteroids and in nitrogenase active cells were also similar, but only about 25 — 30% of that found in nitrogenase repressed Rhizobium japonicum cells. 
  Reference    Z. Naturforsch. 33c, 245 (1978); received February 9 1978 
  Published    1978 
  Keywords    Rhizobium japonicum, Bacteroids, Derepressed Nitrogenase, Differentiation, N-Metabolism 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0245.pdf 
 Identifier    ZNC-1978-33c-0245 
 Volume    33 
43Author    Klaus Scheller, Peter Karlson, Dietrich BodensteinRequires cookie*
 Title    Effects of Ecdysterone and the Juvenile Hormone Analogue Methoprene on Protein, R N A and D N A Synthesis in Wing Discs of Calliphora vicina  
 Abstract    Adolf Butenandt zum 75. G ebu rtstag gew idm et The protein, RNA and DNA content of wing discs increase exponentially during the last larval instar. Biosynthesis of protein, RNA and DNA was studied by injecting labelled precursors into larvae or white prepupae and measuring the incorporation in the wing discs dissected out after an appropriate time. Protein synthesis is stimulated by ecdysterone, methoprene has no effect. Bio­ synthesis of rRNA is increased in wing discs of white prepupae after ecdysterone or methoprene injection. Methoprene inhibits the synthesis of mRNA, while ecdysterone has no clear-cut effect within the limits of our method (gel electrophoretic analysis). Ecdysterone and methoprene have no detectable influence on incorporation of thymidine into DNA, but the incorporation label from uridine into DNA is diminished; this effect may be due to changes in the precursor pool. 
  Reference    Z. Naturforsch. 33c, 253 (1978); received March 9 1978 
  Published    1978 
  Keywords    Ecdysterone, Juvenile Hormone, Wing Discs, Protein Synthesis, RNA Synthesis, DNA Synthesis, C alliph ora vicina 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0253.pdf 
 Identifier    ZNC-1978-33c-0253 
 Volume    33 
44Author    R. G. Binder, B. R. SelmanRequires cookie*
 Title    Ferredoxin Catalyzed Cyclic Photophosphorylation: Reversal of Dibromothymoquinone Inhibition by N ,N ,N ',N '-T etram ethyl- /j-phenylenediamine  
 Abstract    Conditions for washed, spinach thylakoid membranes to catalyze cyclic phosphorylation using ferredoxin as the cofactor for electron transfer have been re-examined. It was found necessary to ''redox poise" the system; however, the best method to accomplish the poising seemed to be the use of a reductant (glucose-6-phosphate) and not by optimizing the rate of phosphorylation with 3-(3,4-dichlorophenyl)-1,1-dimethyl urea (DCMU). Under these conditions, ferredoxin catalyzed cyclic phosphorylation was found to be sensitive to the inhibitors antimycin A and dibromothymo­ quinone (DBM IB). The inhibition of ferredoxin catalyzed cyclic phosphorylation by DBMIB, but not by antimycin A, was completely reversed by N, N, N', N'-tetramethyl-p-phenylenediamine (TM PD). These data are taken as further support for the function of plastoquinone in ferredoxin catalyzed cyclic phosphorylation. The effect of TMPD in reversing the DBMIB inhibition is inter­ preted as the formation of a TMPD bypass on the internal side of the thylakoid membrane around the DBMIB site of inhibition. 
  Reference    Z. Naturforsch. 33c, 261—265 (1978); received November 22 1977 
  Published    1978 
  Keywords    Cyclic Phosphorylation, Chloroplasts, Ferredoxin, Dibromothymoquinone, Phenylenediamine, Photosynthesis 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0261.pdf 
 Identifier    ZNC-1978-33c-0261 
 Volume    33 
45Author    Gerhard Vierke, Peter StruckmeierRequires cookie*
 Title    Inhibition of Millisecond Luminescence by Copper(II) in Spinach Chloroplasts  
 Abstract    Millisecond Luminescence of Chloroplasts, Effect of Copper (II) Intoxication of class II chloroplasts of spinach with Cu(II) leads to inhibition of millisecond luminescence. The degree of inhibition depends on Cu (II) -concentration. The investgation of the pH dpendence of the inhibition curve of luminescence revealed that (1) there is an inhibition site of copper on the donor side of photosystem II, (2) copper (II) does not act as an uncoupler of photophosphorylation, (3) a protonation equilibrium is involved in the inhibition mechanism, and (4) copper (II) binds to a dissociated residue of a membrane protein. 
  Reference    Z. Naturforsch. 33c, 266 (1978); received February 20 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0266.pdf 
 Identifier    ZNC-1978-33c-0266 
 Volume    33 
46Author    JaneM. Bowes, AntonyR. CroftsRequires cookie*
 Title    Interactions of Protons with Transitions of the Watersplitting Enzyme of Photosystem II as Measured by Delayed Fluorescence  
 Abstract    By measuring ms delayed fluorescence emission, we have investigated the interaction of protons in the reactions of the watersplitting enzyme of photosystem II. (1) In the presence of the electron transport mediators 2,3,5,6-tetramethyl-p-phenylene diamine (DAD) (in its reduced form) and methyl viologen and of 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU), the maximal intensity of the delayed fluorescence measured between 1 and 1.5m s after illumination was greater than the level reached in the presence of DCMU alone. (2) The stimulation of the delayed fluorescence was greater when the suspension was pre­ 
  Reference    Z. Naturforsch. 33c, 271 (1978); received February 13 1978 
  Published    1978 
  Keywords    Photosystem II, Watersplitting, Protons, Delayed Fluorescence 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0271.pdf 
 Identifier    ZNC-1978-33c-0271 
 Volume    33 
47Author    E. F. Elstner, D. From, M. EyerRequires cookie*
 Title    Analysis of Different Mechanisms of Photosynthetic Oxygen Reduction  
 Abstract    Three mechanisms of oxygen reduction by chloroplast lamellae in the presence of autoxidizable electron acceptors can be differentiated by product analyis in the presence or absence of either dibromothymoquinone (DBMIB) or superoxide dismutase (SOD) : 1) H20 2 is the product of two-electron oxygen reduction by 2,3-dimethyl-5,6-methylenedioxy-p-benzoquinone, involving only photosystem II. This reaction is not inhibited by either DBMIB or SOD. 2) Superoxide anion, and H20 2 as the product of its dismutation, are products of monovalent oxygen reduction following autoxidation of certain low potential electron acceptors (herbicides) of photosystem I. These reactions are not inhibited by SOD but are blocked by DBMIB. 3) H20 2 is the product of and "apparent" two-electron photoreduction of oxygen, mediated by certain o-diphenols (caffeic acid). These reactions are inhibited by both DBMIB and SOD in­ dicating the involvement of photosystem I and of 0 2-as an intermediate in the H20 2 producing reaction. 
  Reference    Z. Naturforsch. 33c, 276 (1978); received February 6 1978 
  Published    1978 
  Keywords    Oxygen Reduction, Photosynthetic Electron Transport, Superoxide Anion, Peroxide Formation, Chloroplasts 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0276.pdf 
 Identifier    ZNC-1978-33c-0276 
 Volume    33 
48Author    Wilhelm Menke, Friederike Koenig, GeorgH. Schmid, Alfons RadunzRequires cookie*
 Title    Functional Characterization of Four Thylakoid Membrane Polypeptides with Apparent Molecular Weights between 40 000 and 48 000  
 Abstract    Four polypeptides which exhibited apparent molecular weights from 40 000 to 48 000 were isolated from the thylakoid membrane. The isolation was achieved by gel filtration of polypeptides, solubilized by means of sodium dodecyl sulfate and, after removal of detergent by anion exchange chromatography in ethanolic solution. The polypeptide of the molecular weight 40000 was iden­ tified as the 7-component of the coupling factor of photophosphorylation via the effect of its 
  Reference    Z. Naturforsch. 33c, 280 (1978); received February 27 1978 
  Published    1978 
  Keywords    Thylakoid Membrane Polypeptides, Antisera, Photosynthesis 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0280.pdf 
 Identifier    ZNC-1978-33c-0280 
 Volume    33 
49Author    Hans-Peter Ros, Emanuel Schöpp, M.Anfred HesseRequires cookie*
 Title    Indolalkaloide aus den B lättern von Indole Alkaloids from the Leaves of Pagiantha cerifera M arkgraf [1]  
 Abstract    P agian th a cerifera, Apocynaceae, Indole Alkaloids Olivacine, (—) -apparicine and (—)-vobasine have been isolated from leaves of Pagiantha cerifera Markgraf. 
  Reference    Z. Naturforsch. 33c, 290 (1978); eingegangen am 5. Dezember 1977 
  Published    1978 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0290_n.pdf 
 Identifier    ZNC-1978-33c-0290_n 
 Volume    33 
50Author    H. Lentz, H.-D LüdemannRequires cookie*
 Title      
 Abstract    The iaC resonance spectra of fungal melanins from A spergillu s niger, E urotium echinolatum , and Stach ybotrys chartarum are reported. The spectra were taken in 5% W/W solution of the substances in 0.1 N NaOD in D20 using the Fourier-transform-technique. The spectra and possible as­ signments of the bands are discussed. The similarities of these spectra to those of soil humic acids are unexpectedly small. 
  Reference    Z. Naturforsch. 33c, 291 (1978); received November 21 1977/January 19 1978 Melanins 13C Nuclear Magnetic Resonance 
  Published    1978 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0291_n.pdf 
 Identifier    ZNC-1978-33c-0291_n 
 Volume    33 
51Author    Helmut Besl, RichardH. Aibauer, Wolfgang SteglichRequires cookie*
 Title    New Anthraquinone Pigments from Cortinarius armillatus and C. m iniatopus (Agaricales) [1]  
 Abstract    A reinvestigation of the velum pigments of C ortinarius arm illatu s yielded the new anthraquinonecarboxylic acids endocrocin-6,8-dimethyl ether (4) and dermorubin-6-methyl ether (8). 
  Reference    Z. Naturforsch. 33c, 294 (1978); eingegangen am 15. Februar 1978 
  Published    1978 
  Keywords    Cortinarius, Fungus Pigments, Anthraquinonecarboxylic Acids 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0294_n.pdf 
 Identifier    ZNC-1978-33c-0294_n 
 Volume    33 
52Author    F. Bordon, F. Baccichetti, F. CarlassareRequires cookie*
 Title    4,5V D im ethylangelicin, a N ew Very A ctive M onofunctional Furocoum arin  
 Abstract    Photochemotherapy, Angular Furocoumarins, Monoadducts, DNA Synthesis 4,5'-dimethylangelicin is a new angular furocoumarin that by irradiation at 365 nm shows a very high photo­ reactivity towards DNA in vivo, without forming any cross-linkage; by photosensitization of Ehrlich ascites tumor cells a strong inhibition of DNA synthesis was observed. 
  Reference    Z. Naturforsch. 33c, 296 (1978); received December 14 1977 
  Published    1978 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0296_n.pdf 
 Identifier    ZNC-1978-33c-0296_n 
 Volume    33 
53Author    Joan Kraft-Creech, Ingrid Pietsch, Ernst-Randolf LochmannRequires cookie*
 Title    Über den G ehalt an m em brangebundenen und freien R ibosom en in Saccharom yceszellen nach Hem m ung der P roteinsynthese m it Cyclo- hexim id The Content of Membrane-Bound and Free R ibo­ somes in Saccharomyces after the Inhibition of P ro ­ tein Synthesis with Cycloheximid  
 Abstract    After the inhibition of protein synthesis in Saccharom yces cells with cycloheximid, the content of membrane-bound ribosomes decreases significantly, whereas the content of free ribosomes remains the same as the untreated control for a longer period of time. This is further evidence that in yeast cells protein synthesis takes place only on membrane-bound ribosomes. 
  Reference    Z. Naturforsch. 33c, 299 (1978); eingegangen am 2. November 1977/1. Januar 1978 
  Published    1978 
  Keywords    Protein Synthesis, Cycloheximid, Membrane-Bound and Free Ribosomes 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0299_n.pdf 
 Identifier    ZNC-1978-33c-0299_n 
 Volume    33 
54Author    Ulrich Lappe, Wolfgang BarzRequires cookie*
 Title    Degradation of Pisatin by Fungi of the Genus F u sa riu m  
 Abstract    Fifteen strains of Fusarium previously shown to degrade flavonoids and isoflavonoids were investigated for pisatin degradation. Fusarium anguioides and Fusarium avenaceum converted the phytoalexin (1) to the nontoxic 3,6a-dihy-droxy-8,9-methylenedioxypterocarpan (2). 
  Reference    Z. Naturforsch. 33c, 301 (1978); received February 21 1978 
  Published    1978 
  Keywords    Phytoalexin, Pisatin, Fusarium, Degradation, Demethylation 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0301_n.pdf 
 Identifier    ZNC-1978-33c-0301_n 
 Volume    33 
55Author    Ingolf Richter, NikolausW. Eber, HelmutK. Mangold, K. Um, D. M. UkherjeeRequires cookie*
 Title    Incorporation o f P ositional Isom ers of cis-and /n z « 5-O ctadecenoic A cids into the Acyl Lipids o f Cultured Soya Cells  
 Abstract    Cell suspension cultures of soya were incubated with m -[ l -14C] octadecenoic acids and irans-[l-14C]octadecenoic acids, each of known composition with regard to positional isomers. Each of the positional isomers ranging from A 8-to A 15-cj's-octadecenoic acids and A l-to A 16-£r<ms-octadecenoic acids was readily incorporated into the acyl lipids of the cells, yet, the A9-cis-and the zJ9-*r<ms-isomers were the pre­ ferred substrates, cis-trans Isomerization did not occur during the incorporation of the fatty acids into the acyl lipids. 
  Reference    Z. Naturforsch. 33c, 303 (1978); received January 27 1978 
  Published    1978 
  Keywords    Isomeric Octadecenoic Acids, Acyl Lipids, Soya Cells, Suspension Cultures 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0303_n.pdf 
 Identifier    ZNC-1978-33c-0303_n 
 Volume    33 
56Author    H.-D Liidemann, H. Pladi, E. W. Esthof, L. B. TownsendRequires cookie*
 Title    Conformations of 3-Deazaadenosine, 3-Deaza-8-azaadenosine, and Benzimidazole-1-ß-D-riboside in Solution: H RNM R-, Proton-Relaxation-Time-, and Nuclear-Overhauser- Effect Studies  
 Abstract    The solution conformations of 3-deazaadenosine, 3-deaza-8-azaadenosine, and benzimidazole-l-/5-D-riboside have been determined by nuclear magnetic resonance methods in aqueous and ammonia solutions. The two-state S N model of Altona and Sundaralingam is used to analyse the ribose moiety. In order to characterize the orientation of the base relative to the ribose, longitudinal proton relaxation time and nuclear Overhauser enhancement measurements have been carried out. It is shown that 3-deazaadenosine and benzimidazole-l-/?-D-riboside exist preferentially in the S-syn-g+/t (70%) and the N-anti-g+/t (30%) conformation families. In the case of 3-deaza-8-aza-adenosine, some destabilization of the g+ rotamer occurs. In this case, the pulsed methods seem to indicate a preference of the base for the anti range. 
  Reference    Z. Naturforsch. 33c, 305 (1978); received February 17/March 30 1978 
  Published    1978 
  Keywords    Nucleosideanalogs, Conformations, NMR, NOE 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0305.pdf 
 Identifier    ZNC-1978-33c-0305 
 Volume    33 
57Author    Hiroko Ito, K. Aran, RhodaElison Hirsch, SeymourSteven BrodyRequires cookie*
 Title    Stability and Regeneration of Rhodopsin Absorption Spectra at an Air-Water Interface  
 Abstract    Stability and regenerability of the absorption spectrum of CTAB solubilized rhodopsin at an air-water interface is studied. The spectral properties of rhodopsin films in the dark are stable more than 150 minutes. When rhodopsin is bleached (40 — 50%) and maintained in highly com­ pressed films recovery of the spectrum is observed. The recovery is 57% to 100% of the pigment present before irradiation. At low surface pressure or if the films are expanded after irradiation there is no observable recovery. 
  Reference    Z. Naturforsch. 33c, 317 (1978); received March 28 1978 
  Published    1978 
  Keywords    Vision, Rhodopsin, Monolayers, Membranes, Photobiology 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0317.pdf 
 Identifier    ZNC-1978-33c-0317 
 Volume    33 
58Author    L. Sportelli, H. Neubacher, W. LohmannRequires cookie*
 Title    ESR and Optical Studies on the Interaction between Cu(II) and Pepsin  
 Abstract    Cu (II) -Complexes, Pepsin, ESR, Optical Absorption The interaction of Cu (II) with the protein pepsin has been investigated by means of electron spin resonance (ESR) and optical spectroscopy. Depending on the molar ratio of Cu(II) and pepsin in aqueous solution two different complexes are formed. A third complex can be detected after a reaction time of several days, attributed to a complex with a conformationally changed pepsin. The presence of inhibitors l,2-epoxy-3-phenoxypropane (EPP) or diazoacetyl-ethylester (DAE) seems to hinder the conformational change. The structure of the three complexes is discussed. 
  Reference    Z. Naturforsch. 33c, 321 (1978); received March 10 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0321.pdf 
 Identifier    ZNC-1978-33c-0321 
 Volume    33 
59Author    Eckhard SchlimmeRequires cookie*
 Title    Darstellung von (9-ß-D-Ribofuranosyl)-s-triazolo-[ 1,2a]-purin-6-on durch Cyclisierung von N-l-Aminoguanosin Preparation of (9-/3-D-Ribofuranosyl)-s-triazolo-[l,2a]-purine-6-one by Cyclization of N-l-Amino Guanosine  
  Reference    Z. Naturforsch. 33c, 326 (1978); eingegangen am 22. März 1978 
  Published    1978 
  Keywords    s-triazolo-[l, 2a]-purine-6-one, 13C-NMR, 'H-NMR, Cross Links 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0326.pdf 
 Identifier    ZNC-1978-33c-0326 
 Volume    33 
60Author    Nicholas Zagris, CharlesG. MeltonRequires cookie*
 Title    Hemoglobins in Single Chick Erythrocytes as Determined by a Differential Elution Procedure  
 Abstract    The switch from embryonic to adult hemoglobin (Hb) has been studied in vivo by a correlated cytological and electrophoretic analysis of circulating red blood cells from early, purely embryonic-Hb stages to purely adult-Hb stages including the adult chicken. It has been discovered, by using an acid buffer treatment that selectively elutes adult but not embryonic Hb from intact red blood cells, that embryonic and adult Hbs occur together in single cells, and that the switch occurs simultaneously in all cells. These results together with knowledge of the chick erythroid cell dynamics and ontogenetic titers indicate that the initiation of adult Hb synthesis occurs in the circulation in cells previously committed only to embryonic Hb synthesis. 
  Reference    Z. Naturforsch. 33c, 330 (1978); received January 17/March 10 1978 
  Published    1978 
  Keywords    Chick, Erythrocyte, Hemoglobins, Selective Elution 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0330.pdf 
 Identifier    ZNC-1978-33c-0330 
 Volume    33 
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