Anti-bystin antibodies enable researchers to detect and measure the bystin antigen in biological samples. This target is a reported synonym of the BYSL gene, which encodes bystin like. This protein is known to function in rRNA processing and trophectodermal cell differentiation, among other biological roles. The human version of bystin has a canonical amino acid length of 437 residues and a protein mass of 49.6 kilodaltons. It is reported to be localized in the nucleus and cytoplasm of cells and widely expressed in many tissue types. bystin is a member of the Bystin protein family.