Abstract
Light absorbed by the chlorophylls of photosystem (PS) I drives charge separation and electron transfer through a chain of cofactors arranged along one half of the quasi-symmetrical heterodimeric core of the reaction centre. The other branch of the reaction centre is switched off though the influence of the protein, as is the case with the PSII and purple bacterial reaction centres. At least, that is the way the textbooks see it. New data 1 Guergova-Kuras M. et al. Evidence for two active branches for electron transfer in photosystem I. Proc. Natl. Acad. Sci. U. S. A. 2001; 98: 4437-4442 Crossref PubMed Scopus (261) Google Scholar show that this view is probably wrong and that, in fact, electron transfer occurs on both sides of the reaction centre in PSI.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
