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Structured near-infrared Magnetic Circular Dichroism spectra of the Mn₄CaO₅ cluster of PSII in T. vulcanus are dominated by Mn(IV) d-d 'spin-flip' transitions

Morton, Jennifer; Chrysina, Maria; Craig, Vincent S. J.; Akita, Fusamichi; Nakajima, Yoshiki; Lubitz, Wolfgang; Cox, Nicholas; Shen, Jian-Ren; Krausz, Elmars


Photosystem II passes through four metastable S-states in catalysing light-driven water oxidation. Variable temperature variable field (VTVH) Magnetic Circular Dichroism (MCD) spectra in PSII of Thermosynochococcus (T.) vulcanus for each S-state are reported. These spectra, along with assignments, provide a new window into the electronic and magnetic structure of Mn₄CaO₅. VTVH MCD spectra taken in the S₂state provide a clear g=2, S=1/2 paramagnetic characteristic, which is entirely consistent...[Show more]

CollectionsANU Research Publications
Date published: 2018-02
Type: Journal article
Source: Biochimica et biophysica acta
DOI: 10.1016/j.bbabio.2017.10.004
Access Rights: Open Access


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