Anti-Suprabasin antibodies are used in the immunodetection of the protein encoded by the SBSN gene. In humans, the canonical protein has a reported length of 590 amino acid residues and a mass of 60.5 kDa. It is known to be a secreted protein. Alternative splicing is reported to yield 2 different isoforms for this protein. It is notably expressed in thymus, uterus and esophagus. Other names for this target antigen include HLAR698.