1.11.1.18 3 7 activity range for CPO-catalyzed halogenation of carbazole, preferential formation of higher substituted bromocarbazoles under acidic conditions 764586 1.11.1.18 3 7 CPO has preferential enzymatic activities under different pH conditions 764563 1.11.1.18 5 7 pH 5.0: about 35% of maximal activity, pH 7.0: about 25% of maximal activity 675246 1.11.1.18 5.5 10 pH 5.5: 70-90% of maximal activity depending on enzyme form, pH 10.0: about 40% of maximal activity 676980 1.11.1.18 5.8 7.8 activity range 764730 1.11.1.18 7 7.4 - 726122