title: Site-specific inhibition of photophosphorylation in isolated spinach chloroplasts by HgCL2. II. Evidence for three sites of energy conservation associated with non-cyclic electron transport.
abstract: Energy transfer inhibition by HgCl2 has been demonstrated to be selective for certain System I partial reactions. On the basis of different HgCl2 effects on the System I reactions, reduced 2,6-dichlorophenolindophenol --> methylviologen, diaminodurene --> methylviologen and N-phenazine methosulfate cyclic, two sites of energy conservation associated with System I are proposed. Furthermore, these sites are in parallel with each other, in series with the site closely associated with Photosystem II and are shared between non-cyclic and cyclic electron transport.
authors.affiliation: Department of Biological Sciences, University of Cincinnati, Cincinnati, Ohio 45221, USA.
authors.forename: D A
authors.initials: DA
authors.lastname: Bradeen
authors.forename: G D
authors.initials: GD
authors.lastname: Winget
mesh_terms: D002736:Chloroplasts / Q000187:drug effects / Q000378:metabolism; D004579:Electron Transport / Q000502:physiology*; D008027:Light; D008627:Mercuric Chloride / Q000494:pharmacology*; D010785:Photophosphorylation; D045331:Photosystem I Protein Complex / Q000378:metabolism; D045332:Photosystem II Protein Complex / Q000378:metabolism; D018724:Spinacia oleracea / Q000166:cytology / Q000378:metabolism
chemical_list: D045331:Photosystem I Protein Complex; D045332:Photosystem II Protein Complex; D008627:Mercuric Chloride