Abstract
We have calculated the energy levels and wavefunctions of a proton in a histidine(His)–plastoquinone (PQ) system in the reaction centre (RC) of photosystem 2 ofhigher plants and the RC of purple bacteria for different redox states of PQQB. Foroxidized QB,the proton is located near His. For once-reduced PQ, it is positioned in the middlebetween the nitrogen of His and the oxygen of PQ. For twofold-reduced PQ, theproton is localized near the oxygen of PQ. Using the values of total energy of thesystem in these states, we have also estimated the frequency of proton oscillations.On the basis of these results we propose a hypothesis about the coupling ofelectron–proton transfer.
Sign-in/Register to access full text options 
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
