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The chain of water molecules that cross the enzyme in Complex II with the 8α‐N3‐ histidyl FADH2 bond system. The Glu‐A267 and Glu‐B67 residues seem to be important for the water‐molecule organization. For simplicity, all hydrogen atoms are not shown, except for the nonpolar hydrogen atom of FADH2 and those of the water molecules.
