Description
Human CD16 is encoded by two genes, FcγRIIIA and FcγRIIIB. FcγRIIIa is a transmembranous isoform of the receptor expressed on the surface of natural killer (NK) cells, macrophages, a subset of monocytes and of T cells in association with dimers of the γ-chain of FcεRI and/or ζ-chain of T-cell receptors. FcγRIIIb is a glycosylphosphatidylinositol -anchored isoform restricted to neutrophils. FcγRIII plays a significant role in the clearance of immune complexes, antibody- dependent cellular cytotoxicity of K/NK cells,phagocytosis and antigen presentation