Biochemistry, molecular genetics, and biology glossary terms for Companion Sites.


Opsonins bind to target antigens, marking their carrier for phagocytosis. Opsonin molecules include IgG antibodies and components of the complement system (C3b, C4b, and iC3b).

Phagocytic cells express opsonin-binding receptors, and opsonization promotes phagocytosis in addition to inducing increasing the expression of complement receptors on phagocytes.

. . . since 10/06/06