Receptor for complement C3, for the Epstein-Barr virus on human B-cells and T-cells and for HNRNPU . Participates in B lymphocytes activation .
(Microbial infection) Acts as a receptor for Epstein-Barr virus.
Subcellular locations: Cell membrane
Mature B-lymphocytes, T-lymphocytes, pharyngeal epithelial cells, astrocytes and follicular dendritic cells of the spleen.