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

测血小板聚集抑制率、凝血酶原时间和部分凝血活酶时间，比较不同栽居群红花的活血化瘀作用。

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系统的关键成分之一，它是以酶原PPO在于昆虫体内，具有MPO和DPO两种酶活性。