1.21.99.5 R357E inactive 744884 1.21.99.5 R357K the mutant shows about 1% of wild type activity 744884 1.21.99.5 R357N the mutant shows about 10% of wild type activity 744884 1.21.99.5 R357Q the mutant shows about 70% of wild type activity -, 744884 1.21.99.5 synthesis the expression of catalytically active PceA enzyme in Shimwellia blattae is significantly enhanced when its dedicated PceT chaperone is coproduced and when 5,6-dimethylbenzimidazole and hydroxocobalamin are added to the cultures -, 739904 1.21.99.5 Y298F inactive -, 744884 1.21.99.5 Y298H the mutant shows about 30% of wild type activity -, 744884 1.21.99.5 Y298S the mutant shows about 3% of wild type activity -, 744884 1.21.99.5 Y298T the mutant shows about 10% of wild type activity -, 744884