Santabarbara S, Kuprov I, Hore PJ, Casal A, Heathcote P, Evans MCW. Analysis of the Spin-Polarized Electron Spin Echo of the [P700+A1-] Radical Pair of Photosystem I Indicates That Both Reaction Center Subunits Are Competent in Electron Transfer in Cyanobacteria, Green Algae, and Higher Plants. Biochemistry. 2006 May 19;45(23):7389–403. doi: 10.1021/bi060330h.
Analysis of the Spin-Polarized Electron Spin Echo of the [P700+A1-] Radical Pair of Photosystem I Indicates That Both Reaction Center Subunits Are Competent in Electron Transfer in Cyanobacteria, Green Algae, and Higher Plants