Anti-RUS antibodies enable researchers to detect and measure the RUS antigen in biological samples. This target is a reported synonym of the RUSF1 gene, which encodes RUS family member 1. The human version of RUS has a canonical amino acid length of 468 residues and a protein mass of 51 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the membrane of cells. RUS is a member of the RUS1 protein family.