Kinin–kallikrein system
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The kinin–kallikrein system or simply kinin system is a poorly understood hormonal system with limited available research.[1] It consists of blood proteins that play a role in inflammation,[2] blood pressure control, coagulation and pain. Its important mediators bradykinin and kallidin are vasodilators and act on many cell types. Clinical symptoms include marked weakness, tachycardia, fever, leukocytosis and acceleration of ESR.