Anti-CD122 antibodies enable researchers to detect and measure the CD122 antigen in biological samples. This target is a reported synonym of the IL2RB gene, which encodes interleukin 2 receptor subunit beta. This protein is known to function in cytokine-mediated signaling pathways and the regulation of apoptosis, among other biological roles. The human version of CD122 has a canonical amino acid length of 551 residues and a protein mass of 61.1 kilodaltons. It is reported to be localized in the cell membrane of cells and notably expressed in the tonsil, spleen, lymph node, endometrium, and bone marrow. This target antigen may also be known as IL15RB.