Anti-IPR1 antibodies enable researchers to detect and measure the IPR1 antigen in biological samples. This target is a reported synonym of the SP110 gene, which encodes SP110 nuclear body protein. This protein is known to function in the regulation of transcription, among other biological roles. The human version of IPR1 has a canonical amino acid length of 689 residues and a protein mass of 78.4 kilodaltons, although 7 isoforms have been identified. It is reported to be localized in the nucleus of cells. Other names for this target antigen include IFI41 and IFI75.