Fig. 1From: Involvement of high-valent manganese-oxo intermediates in oxidation reactions: realisation in nature, nano and molecular systems(Copyright 2014, AAAS the science society publications. c Distances (in Å) between metal atoms and oxo bridges or water molecules [34]. Adapted with permission from [34]. Copyright 2011, Nature publishing group)a Active site structure of the oxygen evolving complex, a Mn4O5Ca cofactor with bond lengths [35]. b The five intermediate “S” states of the reaction cycle, showing the sequence of electron- and proton-removal steps and the likely oxidation states of the Mn ions in each metastable state. Adapted with permission from [35]Back to article page