CD23, FCE2, CD23A, IGEBF, CLEC4J, BLAST-2, Low affinity immunoglobulin epsilon Fc receptor, C-type lectin domain family 4 member J, Fc-epsilon-RII, Immunoglobulin E-binding factor, Lymphocyte IgE receptor, FCER2
Low-affinity receptor for immunoglobulin E (IgE) and CR2/CD21. Has essential roles in the regulation of IgE production and in the differentiation of B-cells (it is a B-cell-specific antigen).