(electronics) an 80-mm (3-inch) CD (compact disc) / (music) a 3-inch CD single

(immunology) an antigen, part of the T cell receptor (TCR) complex on mature T lymphocytes

glycoprotein found on the surface of many immune cells (white blood cells), including CD4+, CD8+, B lymphocytes and natural killer cells, functioning in cell adhesion, signal transduction and calcium signaling

a transmembrane receptor expressed on blood cells of myeloid lineage, though also found on some lymphoid cells

a cell membrane protein of the tumor necrosis factor receptor family, serving as a tumor marker and the target of brentuximab vedotin

a cell surface protein that is used as a marker of plasma cells, targeted by elotuzumab.

a protein that constitutes the Knops blood group system; it processes and clears complement opsonized immune complexes