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系统的关键成分之，它是以酶原形式PPO存在于昆虫，有MPO和DPO两种酶活。

As an important leucoprotease,myeloperoxidase (MPO) has many effects in mediating inflammation,regulating immune response and so on,which also takes part in the genesis and development of diseases.

髓过氧化物酶种白细胞酶,有介导炎反应、调节免疫应答等多种功能,并可参与疾病的发生发展过程。