2BOZ:
reference: Strong effects of an individual water molecule on the rate of light-driven charge separation in the Rhodobacter sphaeroides reaction center., Potter JA, Fyfe PK, Frolov D, Wakeham MC, van Grondelle R, Robert B, Jones MR, J Biol Chem. 2005 Jul 22;280(29):27155-64. Epub 2005 May 20. PMID: 15908429

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