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Representation of the structural models of two R-selective HheC mutants, the T134V/L142M (A) and L142F/N176H (B) mutants, with (R)-2-CPE docked in the active site. The catalytic triad Ser132/Tyr145/Arg149 and the mutated residues are shown in stick representation. Hydrogen bonds are indicated as dashed lines.
