Cox, Nicholas; Hughes, Joseph; Steffen, Ronald; Smith, Paul; Rutherford, William; Pace, Ronald; Krausz, Elmars
Low-temperature absorption and CD spectra, measured simultaneously, are reported from Photosystem II (PS II) reduced with sodium dithionite. Spectra were obtained using PS II core complexes before and after photoaccumulation of PheoD1-, the anion of the primary acceptor. For plant PS II, PheoD1- was generated under conditions in which the primary plastoquinone was present as an anion (QA-) and as a modified species taken to be the neutral doubly reduced hydroquinone (QAH2). The bleaches...[Show more]
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