UniProt Summary: Mediates tubular uptake of organic compounds from circulation. Mediates the influx of agmatine, dopamine, noradrenaline (norepinephrine), serotonin, choline, famotidine, ranitidine, histamin, creatinine, amantadine, memantine, acriflavine, 4-[4-(dimethylamino)-styryl]-N-methylpyridinium ASP, amiloride, metformin, N-1-methylnicotinamide (NMN), tetraethylammonium (TEA), 1-methyl-4-phenylpyridinium (MPP), cimetidine, cisplatin and oxaliplatin. Cisplatin may develop a nephrotoxic action. Transport of creatinine is inhibited by fluoroquinolones such as DX-619 and LVFX. This transporter is a major determinant of the anticancer activity of oxaliplatin and may contribute to antitumor specificity. {ECO:0000269|PubMed:12089365, ECO:0000269|PubMed:12538837, ECO:0000269|PubMed:15496291, ECO:0000269|PubMed:15783073, ECO:0000269|PubMed:16006492, ECO:0000269|PubMed:16272756, ECO:0000269|PubMed:16314463, ECO:0000269|PubMed:16394027, ECO:0000269|PubMed:16914559, ECO:0000269|PubMed:16951202, ECO:0000269|PubMed:17072098, ECO:0000269|PubMed:17582384, ECO:0000269|PubMed:9260930, ECO:0000269|PubMed:9687576}.