Anti-Aquaporin 9 antibodies are used in the immunodetection of the protein encoded by the AQP9 gene. In humans, the canonical protein has a reported length of 295 amino acid residues and a mass of 31.4 kDa. Its subcellular localization is in the cell membrane. It is reported to be highly expressed in peripheral leukocytes. The aquaporin 9 protein is a member of the MIP/aquaporin (TC 1.A.8) protein family. Other names for this target antigen include SSC1, T17287, aquaglyceroporin-9, small solute channel 1, and HsT17287.