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. 2007 Apr 12;104(17):7283–7288. doi: 10.1073/pnas.0701847104

Fig. 1.

Fig. 1.

Scheme for electron transfer and cofactor organization of PSII RC. Arrows show the direction of electron transfer. Pigments located on the D1 protein are shown with a subscript D1, and those on the D2 protein are shown with a subscript D2. PD1 and PD2, the special pair; ChlD1 and ChlD2, the accessory Chl; PheD1, the primary electron acceptor, pheophytin; PheD2, pheophytin; ChlzD1 and ChlzD2, peripheral Chl; QA, the secondary electron acceptor; YZ, secondary electron donor; YD, tyrosine on the D2 protein.