Anti-IK cytokine, down-regulator of HLA II antibodies enable researchers to detect and measure the IK cytokine, down-regulator of HLA II antigen in biological samples. This target is a reported synonym of the IK gene, which encodes IK cytokine. This protein is known to function in the cell cycle and RNA splicing, among other biological roles. The human version of IK cytokine, down-regulator of HLA II has a canonical amino acid length of 557 residues and a protein mass of 65.6 kilodaltons. It is reported to be localized in the nucleus and cytoplasm of cells and widely expressed in many tissue types. Other names for this target antigen include CSA2, RED, and RER.