Solute carrier family 10 member 1 (SLC10A1), also known as sodium/taurocholate cotransporting polypeptide (NTCP), represents a hepatic sodium/bile acid uptake system that exhibits broad substrate specificity []. NTCP also transports various non-bile acid organic compounds, including steroidal hormones such as estrone-3-sulfate and dehydroepiandrosterone (DHEAS), bromosulphthalein and a variety of xenobiotics []. It also mediates transport of (sulfated) iodothyronines [].