Anti-REQ antibodies enable researchers to detect and measure the REQ antigen in biological samples. This target is a reported synonym of the DPF2 gene, which encodes double PHD fingers 2. This protein is known to function in the apoptotic pathway and chromatin remodeling, among other biological roles. The human version of REQ has a canonical amino acid length of 391 residues and a protein mass of 44.2 kilodaltons, although 2 isoforms have been identified. 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 CSS7 and SMARCG2.