A complement receptor is a receptor of the complement system, a part of the mediated innate immune system. Complement receptors are responsible for detecting pathogens by mechanisms not mediated by antibodies.
|CR3||Macrophage-1 antigen or "integrin alphaMbeta2"||CD11b+CD18|
|CR4||Integrin alphaXbeta2 or "p150,95"||CD11c+CD18|
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