PCET in Photosystem II

The identification of tyrosine-161 of the D1 subunit in PSII (Yz), as the redox mediator between the oxidation of the OEC and reduction of P680 was first proposed by Babcock et and Britt et Krishtalik had previously 

(b) Square diagram illustrating the thermodynamic requirements associated to stepwise and concerted mechanisms. 

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