Anti-Slc21a9 antibodies enable researchers to detect and measure the Slc21a9 antigen in biological samples. This target is a reported synonym of the SLCO2B1 gene, which encodes solute carrier organic anion transporter family member 2B1. This protein is known to function in the transport of ions and transmembrane transport, among other biological roles. The human version of Slc21a9 has a canonical amino acid length of 709 residues and a protein mass of 76.7 kilodaltons, although 4 isoforms have been identified. It is reported to be localized in the cell membrane of cells. Slc21a9 is a member of the Organo anion transporter (TC 2.A.60) protein family.