Recombinant proteins for solute carrier family 22 member 4 are available from various sources. In humans, this protein has a Uniprot ID of Q9H015 and has an annotated function: 'Sodium-ion dependent, low affinity carnitine transporter.' This protein is 551 amino acids in length and 62.2 kilodaltons in mass. This protein is encoded by the gene SLC22A4. Other names also exist, such as: solute carrier family 22 member 4, ET transporter, deafness, autosomal recessive 60, ergothioneine transporter, integral membrane transport protein, organic cation/carnitine transporter 1, solute carrier family 22 (organic cation/ergothioneine transporter), member 4, solute carrier family 22 (organic cation/zwitterion transporter), member 4. This protein is conserved in other species, including: mouse, rat, zebrafish, chimpanzee, guinea pig.