Anti-OATP1 antibodies are protein reagents that detect specific antigens. The OATP1 antigen is another term for the human protein solute carrier organic anion transporter family member 4A1, encoded by the SLCO4A1 gene. The protein is known to mediate the Na(+)-independent transport of organic anions such as the thyroid hormones T3 (triiodo-L-thyronine), T4 (thyroxine) and rT3, taurocholate, estrone 3-sulfate, estradiol-17beta-glucuronide and prostaglandin E2 (PGE2). Canonically, it has an amino acid length of 722 residues and a mass of 77.2 kilodaltons. Its subcellular localization is in the cell membrane and it is found to be widely expressed, with the exception of spleen and leukocytes. The OATP1 protein is a member of the Organo anion transporter (TC 2.A.60) protein family. Indicated applications for OATP1 antibodies listed below include ELISA and Western Blot.