1.14.13.B28 additional information the enzyme also catalyzes hydrogen peroxide-driven ethylbenzene hydroxylation. The ethylbenzene hydroxylation activity is higher than the styrene epoxidation activity, maybe due to a difference in the binding affinity of the two substrates. The rate-limiting steps of ethylbenzene hydroxylation and styrene epoxidation are the same, and may be any step before formation of the active oxidant Sulfurisphaera tokodaii ? - ? 89 1.14.13.B28 additional information electron-transfer reaction between the electrode and heme iron. Direct electrochemistry of P450st in a didodecyldimethylammonium bromide film on a plastic formed carbon electrode is demonstrated. A quasi-reversible redox response is observed at temperatures of up to 80°C Sulfurisphaera tokodaii ? - ? 89 1.14.13.B28 additional information the initial activities of CYP119 in the presence of tert-butyl hydroperoxide and cumene hydroperoxide are two- and fivefold higher than that observed with H2O2. tert-Butyl hydroperoxide increases both turnover rate and the stability of the enzyme under the oxidizing reaction conditions Sulfolobus acidocaldarius ? - - 89 1.14.13.B28 additional information the initial activities of CYP119 in the presence of tert-butyl hydroperoxide and cumene hydroperoxide are two- and fivefold higher than that observed with H2O2. tert-Butyl hydroperoxide increases both turnover rate and the stability of the enzyme under the oxidizing reaction conditions Sulfolobus acidocaldarius DSM 639 ? - - 89 1.14.13.B28 additional information the enzyme also catalyzes hydrogen peroxide-driven ethylbenzene hydroxylation. The ethylbenzene hydroxylation activity is higher than the styrene epoxidation activity, maybe due to a difference in the binding affinity of the two substrates. The rate-limiting steps of ethylbenzene hydroxylation and styrene epoxidation are the same, and may be any step before formation of the active oxidant Sulfurisphaera tokodaii 7 ? - ? 89 1.14.13.B28 additional information electron-transfer reaction between the electrode and heme iron. Direct electrochemistry of P450st in a didodecyldimethylammonium bromide film on a plastic formed carbon electrode is demonstrated. A quasi-reversible redox response is observed at temperatures of up to 80°C Sulfurisphaera tokodaii 7 ? - ? 89 1.14.13.B28 styrene + cumen hydroperoxide - Sulfolobus acidocaldarius styrene epoxide + ? - ? 463033 1.14.13.B28 styrene + cumen hydroperoxide - Sulfolobus acidocaldarius DSM 639 styrene epoxide + ? - ? 463033 1.14.13.B28 styrene + NADH + H+ + O2 - Sulfurisphaera tokodaii styrene epoxide + NAD+ + H2O - ? 427068 1.14.13.B28 styrene + NADH + H+ + O2 the initial rate of catalysis with NADH is slightly higher than with NADPH Sulfurisphaera tokodaii styrene epoxide + NAD+ + H2O - ? 427068