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'Hydrogenase' in keywords Facet   Publication Year 1993  [X]
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1Author    Thom As Urbig, Rüdiger Schulz, H. Orst SengerRequires cookie*
 Title    Inactivation and Reactivation of the Hydrogenases of the Green Algae Scenedesmus obliquus and Chlamydomonas reinhardtii  
 Abstract    The hydrogenases of the green algae Scenedesmus obliquus and Chlamydomonas reinhardtii were activated under anaerobic conditions. Exposure o f whole cells and cell-free homogenates to air lead to a complete inactivation of the hydrogenases. The inactivation in whole cells of Scenedesmus is faster than the inactivation of the cell-free homogenate. Inactivation o f the hy­ drogenases could be reversed by anaerobic readaptation in whole cells. The inactivation of the hydrogenase in homogenates seems to be irreversible. N either the removal o f oxygen nor the addition of ATP, N AD(P)H, sodium dithionite, dithiothreitol, ferredoxin and thioredoxin to homogenates facilitated the reactivation o f the hydrogenase. The occurrence of a hydrogenase regulating factor is discussed. 
  Reference    Z. Naturforsch. 48c, 41 (1993); received September 30/December 21 1992 
  Published    1993 
  Keywords    Scenedesmus obliquus, Chlamydomonas reinhardtii, Hydrogenase, Reactivation Process, Inactivation 
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 TEI-XML for    default:Reihe_C/48/ZNC-1993-48c-0041.pdf 
 Identifier    ZNC-1993-48c-0041 
 Volume    48 
2Author    J.-H KlemmeRequires cookie*
 Title    Photoproduction of Hydrogen by Purple Bacteria: A Critical Evaluation of the Rate Limiting Enzymatic Steps  
 Abstract    The enzymatic mechanisms and energetics o f nitrogenase-catalyzed photoproduction o f hydrogen from organic C -com pounds by purple bacteria are discussed in respect to the ques­ 
  Reference    Z. Naturforsch. 48c, 482 (1993); received January 15 1993 
  Published    1993 
  Keywords    Hydrogen, Hydrogenase, N itrogenase, Purple Bacteria, Photosynthesis 
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 TEI-XML for    default:Reihe_C/48/ZNC-1993-48c-0482.pdf 
 Identifier    ZNC-1993-48c-0482 
 Volume    48