Organic zwitterions/cation transporters (OCTN)

Unless otherwise stated all data on this page refer to the human proteins. Gene information is provided for human (Hs), mouse (Mm) and rat (Rn).


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Organic zwitterions/cation transporters (OCTN) function as organic cation uniporters, organic cation/proton exchangers or sodium/L-carnitine co-transporters.


OCTN1 (Organic cation/carnitine transporter 1 / SLC22A4) Show summary »

OCTN2 (Organic cation/carnitine transporter 2 / SLC22A5) Show summary »

CT2 (Carnitine transporter 2 / SLC22A16) Show summary »

Further reading

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NC-IUPHAR subcommittee and family contributors

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How to cite this family page

Database page citation:

Bruno Hagenbuch. Organic zwitterions/cation transporters (OCTN). Accessed on 06/10/2015. IUPHAR/BPS Guide to PHARMACOLOGY,

Concise Guide to PHARMACOLOGY citation:

Alexander SPH, Benson HE, Faccenda E, Pawson AJ, Sharman JL, Spedding M, Peters JA and Harmar AJ, CGTP Collaborators. (2013) The Concise Guide to PHARMACOLOGY 2013/14: Transporters. Br J Pharmacol. 170: 1706–1796.