ID 1.14.14.75 DE fenbendazole monooxygenase (4'-hydroxylating). AN CYP2C19. CA fenbendazole + reduced [NADPH--hemoprotein reductase] + O2 = CA 4'-hydroxyfenbendazole + oxidized [NADPH--hemoprotein reductase] + H2O + CA H(+). CC -!- CYP2C19 is microsomal cytochrome P450 monooxygenase that catalyzes CC the hydroxylation of the benzene ring of fenbendazole, a broad- CC spectrum anthelmintic used against gastrointestinal nematodes and the CC larval stages of cestodes. CC -!- This activity is also carried out by CYP2J2. cf. EC 1.14.14.74. CC -!- CYP2C19 does not act on albendazole. DR P33261, CP2CJ_HUMAN; //