Anti-XR antibodies enable researchers to detect and measure the XR antigen in biological samples. This target is a reported synonym of the DCXR gene, which encodes dicarbonyl and L-xylulose reductase. This protein is known to function in carbohydrate metabolism and homeostasis, among other biological roles. The human version of XR has a canonical amino acid length of 244 residues and a protein mass of 25.9 kilodaltons. It is reported to be localized in the membrane of cells and widely expressed in many tissue types. Other names for this target antigen include DCR, HCR2, and HCRII.