Anti-GSL antibodies enable researchers to detect and measure the GSL antigen in biological samples. This target is a reported synonym of the CTSA gene, which encodes cathepsin A. This protein is known to function in intracellular protein transport and proteolysis, among other biological roles. The human version of GSL has a canonical amino acid length of 480 residues and a protein mass of 54.5 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the lysosomes of cells and widely expressed in many tissue types. Other names for this target antigen include GLB2 and NGBE. Western Blot is the most common application for the GSL antibodies listed below. ELISA and Immunohistochemistry are also common applications.