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(a–g) Simplified PSI charge-separation schemes suggested by different authors: (a–d) Müller et al. (25, 30), (e) van Stokkum et al. (26), (f) Shelaev et al. (27) and (g) Di Donato et al. (9). To simplify comparison, the indicated time constants are typical values observed by the authors of the corresponding studies and do not represent exact rates. Ant, antenna Chls a; P700, Chl a pair; A and A0, Chl a pigments; A1, phylloquinone; RC, reaction center; red, red Chl a pool.
