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

测定小板聚集抑制率、凝酶原和部分凝酶，较不同栽居群红花化瘀作用。

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