Epoxidation reactions catalyzed by CYPs in production a. The diastereoselective epoxidation of dimethyl cis-1,2,3,6-tetrahydrophthalate catalyzed by CYP102A1; b. Converting 4,5-benzoxepin to 2,3-epoxyoxepin via CYP isoforms; c. A series of epoxidation of substituted styrenes catalyzed by P450pyr variant; d. The two-step oxidative cascade catalyzed by OleTJE and CYP102A1; e. A general model for multi-enzyme cascades involving CYPs-catalyzed epoxidation.