Anti-C4orf27 antibodies enable researchers to detect and measure the C4orf27 antigen in biological samples. This target is a reported synonym of the HPF1 gene, which encodes histone PARylation factor 1. This protein is known to function in DNA damage pathways and DNA repair, among other biological roles. The human version of C4orf27 has a canonical amino acid length of 346 residues and a protein mass of 39.4 kilodaltons. It is reported to be localized in the nucleus and chromosomes of cells. C4orf27 is a member of the HPF1 protein family.