1.14.13.54 K295A the mutant is 3times more active than the wild type enzyme 1.14.13.54 L500Y the mutant is about 2.5times more active than the wild type enzyme 1.14.13.54 P157Q the mutant shows wild type activity 1.14.13.54 T345L the mutation turns the enzyme inactive against progesterone without altering the catalytic efficiency for phenylacetone 1.14.13.54 V291A the mutant is less active than the wild type enzyme