The kallikrein system which produces the potent vasodilator bradykinin is beginning to be studied .

血管舒缓素系统产生强力的血管扩张物质缓激肽，有人正开始这种研究。

A second drug , kallikrein , for stroke prevention , may also be exported .

第二种用于防治中风的药物舒血管素（kallikrein）也可能出口。