酶原的

Percentage of restraining platelet aggregation, prothrombin time and partial thromboplastic time were measured to compare the huoxuehuayu effects of different populations of safflower.

测定血小板聚集抑制率、血酶原时间和血活酶时间，比较不同栽培居群红花活血化瘀作用。

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系统关键成之一，它是以酶原形式PPO存在于昆虫体内，具有MPO和DPO两种酶活。