Origin of the unique topology of the triangular water cluster in Rubrobacter xylanophilus rhodopsin
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The crystal structure of Rubrobacter xylanophilus rhodopsin (RxR) reveals a triangular cluster of three water molecules (W413, W415, and W419) at the extracellular proton-release site, near Glu187 and Glu197. Using a quantum mechanical/molecular mechanical app... ...
