But at the sites in the gel, where the catalase isozymes do not exist, the H 2O 2 will react with KMnO 4 under the neutral conditions resulting in the brown MnO 2 precipitates.

• 而在无过氧化氢酶的地方 ,H2 O2 能在中性条件下与KMnO4反应生成棕色的MnO2 沉淀。