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View of the aligned crystal structures of PrnA and PyrH rendered with transparent protein ribbons, PrnA with yellow ribbons, and PyrH with green ribbons. The substrate tryptophan, hypochlorous acid, and the active lysine and glutamate residues are rendered as tubes with carbon atoms colored according to the protein: PrnA in bright green and PyrH in light blue. The to-be halogenated carbon (C7/C5) of the substrate tryptophan is rendered as a sphere.
