Kallikrein-kinin system (KKS) is composed of kinin, kininogen, kininogenase or kellikrein, and kininase, distributing in the animal bodies widely.

激肽系统广泛存在于动物体内,和体内多个系统及其他细胞因子有密切的联系和交叉对话,发挥重要作用。