Cell-surface CD molecules preferentially expressed on B cells
| CD Name | Alternative Name | Gene Family | Expression | Function |
|---|---|---|---|---|
| CD19 | B4 | Ig superfamily | All B cells | Regulates B-cell signaling |
| CD20 | B1 | Tetraspan family | Mature B cells | Membrane-embedded Ca2+ channel |
| CD21 | CR2 | Complement receptor family | Mature B cells and FDC | Acts as a complement receptor (C3d) |
| CD22 | BL-CAM | Ig superfamily | Mature B cells | Lectin-like adhesion molecule |
| CD23 | FcεR | C-type lectin | Activated B cells and FDC | Low-affinity IgE receptor |
| CD79a,b | Ig α/β | Ig superfamily | Ig + B cells | Mediates Ig signaling |
| CD267 | TACI | TNFR superfamily | Subset of mature B cells | Cell-survival receptor |
| CD269 | BCMA | TNFR superfamily | Mature B cells and plasma cells | Cell-survival receptor |
| CD307 | FCRL5 | Ig superfamily | Mature B cells | Regulates B-cell activation |