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A “decoupling effect” (light-induced electron transport without O2 evolution) was observed in Ca-depleted photosystem II (PSII(-Ca)) membranes, which lack PsbP and PsbQ (Semin et al. (2008) Photosynth. Res., 98, 235–249). Here PsbO-depleted PSII (PSII(-PsbO)) membranes (which also lack PsbP and PsbQ) were used to examine effects of PsbO on the decoupling.(More)
Isolated appressed chloroplast membranes, highly enriched in photosystem II (PSII) activity, were examined by freeze-etch electron microscopy. The exposed surfaces of these Triton X-100 solubilized membrane fragments correspond to the lumenal or ESs surface of intact stacked thylakoid membrane regions (Dunahay, T. G., L. A. Staehelin, M. Seibert, P. D.(More)
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