complement system

(redirected from Complement 3A)

com·ple·ment sys·tem

a group of more than 20 serum proteins, some of which can be serially activated and participate in a cascade resulting in cell lysis; the complement system also functions in chemotaxis, opsonization, and phagocytosis.
References in periodicals archive ?
Discrimination of sepsis and systemic inflammatory response syndrome by determination of circulating plasma concentrations of procalcitonin, protein complement 3a, and interleukin-6.