the role of the kinin-forming system with oxytocin in the mechanism of labor was suggested from the results of decreased prekallikrein and hmw kininogen , appearance of a free kallikrein-like enzyme during labor , and from the case of arrested labor in which both prekallikrein and hmw kininogen were markedly decreased .
C0022478
kallikrein
C0033024
prekallikrein