A comprehensive table of transporters identified in human
indicates presence detected as either protein, mRNA, or functional activity by any relevant analytical methodology. indicates lack of evidence. indicates conflicting literature reports, i.e., not detected by one or more laboratories in contrast to presence detected by others. indicates absence, i.e., not detected as either protein, mRNA or functional activity by any relevant analytical methodology. Transporters have not been identified in aqueous humor, vitreous humor, RPE, optic nerve, and sclera. These tissues are therefore not included in the table.