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1979 (1)
1977 (1)
1976 (1)
1Author    Wilhelm Menke, Alfons Radunz, GeorgH. Schmid, Friederike Koenig, Rolf-Dieter HirtzRequires cookie*
 Title    Intermolecular Interactions of Polypeptides and Lipids in the Thylakoid Membrane  
 Abstract    Intermolecular interactions between chloroplast lipids and a polypeptide fraction from thylakoids were investigated by far ultraviolet circular dichroism. The polypeptide fraction was isolated from dodecyl sulfate-containing buffers. It exhibits an average molecular weight of 24 000. The circular dichroism of this polypeptide fraction measured as mean residue ellipticity is greater in the presence of sodium dodecyl sulfate than in the absence of this detergent. This effect is reversible. Addition of sulfoquinovosyl diglyceride to the dodecyl sulfate-free solution of the polypeptide also causes an increase of the circular dichroism. This increase was only observed in the pH-range between 6.9 and 7.4. The effect of dodecyl sulfate or sulfolipid on the circular dichroism is inter­ preted to indicate an increase of a-helix content. Monogalactosyl diglyceride, digalactosyl di­ glyceride and phosphatidyl glycerol gave no reaction. The attempt to obtain a conformational analysis of the polypeptide in the different states did not yield an entirely satisfactory result. Anti­ sera to sulfolipid inhibit photosynthetic electron transport of stroma-freed chloroplasts in the region of light reaction I. This inhibition is restricted to the same pH-range as the non-covalent binding of sulfolipid to the polypeptides. It appears that in the cell membrane-bound metabolic processes are regulated by this pH-dependence of the sulfolipid-polypetide interactions. 
  Reference    (Z. Naturforsch. 31c, 436 [1976]; received April 30 1976) 
  Published    1976 
  Keywords    Interactions, Polypeptides, Lipids, Thylakoid Membrane, Photosynthesis 
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 TEI-XML for    default:Reihe_C/31/ZNC-1976-31c-0436.pdf 
 Identifier    ZNC-1976-31c-0436 
 Volume    31 
2Author    BrunoW. Urzer, B. A. Sf, A. KtiengesellschaftRequires cookie*
 Title    Interpretation of Plant Growth Responses to Chemicals  
 Abstract    W hile searching for chem ical com pounds with herbicidal or growth regulating activities the researcher gladly notices if intact plants respond to the treatments at all. By means of colour slides, which unfortunately could not be printed here, changes in plant growth and leaf colour induced by chem icals were dem onstrated as they usually occur in an industrial screening operation. The range of sym ptom s shown in the presentation included sim ple lethal necrosis, "bleaching", increased generation of anthocyans, deterioration of the plant tissue, control of axillary buds, the prevention of resprouting, stunting of the shoots, and epinasties. Chem ical com pounds synthesised in the BA SF laboratories and com m ercial products were applied. 
  Reference    Z. Naturforsch. 34c, 931 (1979); received June 5 1979 
  Published    1979 
  Keywords    Plant Growth R esponse, H erbicides, Growth Regulators, Indicator Plants, Interactions 
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 TEI-XML for    default:Reihe_C/34/ZNC-1979-34c-0931.pdf 
 Identifier    ZNC-1979-34c-0931 
 Volume    34 
3Author    Lothar Bornmann, Benno HessRequires cookie*
 Title    Interaction of Cibacron Dyes with Dehydrogenases and Kinases  
 Abstract    Cibacronblue The inhibition of the activity of various kinases and dehydrogenases by Cibacronblue 3 G-A and its structural analogues relies on the interaction of the anthrachinone moiety as well as of the neighbouring phenyl group of the dye with the proteins. Binding is intensified by hydrophobic sub­ stituents at the latter ring system. 
  Reference    (Z. Naturforsch. 32c, 756—759 [1977]; received June 27 1977) 
  Published    1977 
  Keywords    3 G-A, Inhibition, Interaction, Structural Requirement, Kinases and Dehydrogenases 
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 TEI-XML for    default:Reihe_C/32/ZNC-1977-32c-0756.pdf 
 Identifier    ZNC-1977-32c-0756 
 Volume    32