Anti-E2-EPF antibodies enable researchers to detect and measure the E2-EPF antigen in biological samples. This target is a reported synonym of the UBE2S gene, which encodes ubiquitin conjugating enzyme E2 S. This protein is known to function in cell division and protein ubiquitination, among other biological roles. The human version of E2-EPF has a canonical amino acid length of 222 residues and a protein mass of 23.8 kilodaltons. It is reported to be notably expressed in the vagina, tonsil, testis, lymph node, and appendix. E2-EPF is a member of the Ubiquitin-conjugating enzyme protein family.