Anti-R-S antibodies enable researchers to detect and measure the R-S antigen in biological samples. This target is a reported synonym of the RS1 gene, which encodes retinoschisin 1. This protein is known to function in cell adhesion and eye development, among other biological roles. The human version of R-S has a canonical amino acid length of 224 residues and a protein mass of 25.6 kilodaltons. It is reported to be localized in the cell membrane and is secreted of cells and notably expressed in the retina.