Of the system, P0 is one of the important components; it has twoactivities, MPO and DPO, and exists as proenzyme PPO in the insect.
其中，PO是PPO系统的关键成
，它是
酶原形式PPO存在于昆
体内，具有MPO和DPO两种酶活性。
Of the system, P0 is one of the important components; it has twoactivities, MPO and DPO, and exists as proenzyme PPO in the insect.
其中，PO是PPO系统的关键成，它是酶原形式PPO存在于昆体内，具有MPO和DPO两种酶活性。
声
：
例句、词性
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