1.1.1.214 (R)-pantolactone substrate inhibition of the recombinant isozyme expressed in Escherichia coli at a concentration above 10 mg/ml 5079 1.1.1.214 2-keto-4-hydroxybutyrolactone strong and uncompetitive inhibitor 48516 1.1.1.214 Ag+ 1 mM, complete inhibition 75 1.1.1.214 Co2+ 1 mM, 81.9% residual activity 23 1.1.1.214 Cu2+ 1 mM, 67.8% residual activity 19 1.1.1.214 EDTA 1 mM, 72.9% residual activity 21 1.1.1.214 Fe2+ 1 mM, 81% residual activity 25 1.1.1.214 Mg2+ 1 mM, 67.6% residual activity; 1 mM, 80.2% residual activity 6 1.1.1.214 additional information not inhibitory: 1 mM Ni2+ or Ca2+ 2 1.1.1.214 Pb2+ 1 mM, complete inhibition 139