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To enhance the enantioselectivity of a hyperthermophilic esterase from archaeon Aeropyrum pernix K1 (APE1547), a directed evolution approach is employed to generate mutant library from the native enzyme. A mutation (TBC26) is identified after one round of epPCR. The enantioselectivity of TBC26 is increased up to 2.6-fold compared to that of wild type enzyme. TBC26 contains five amino acid substitutions...
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