The study of the blood-brain barrier is highly dynamic. As new information becomes available we will update this page.
The arrows indicate the transporter's primary direction of transport. However, for some SLC transporters, transport in the opposite direction is also possible. For example, tetraethylammonium efflux is trans-stimulated by extracellular tetraethylammonium or with acidic external medium pH in OCTN1-expressing HEK293 cells (Yabuuchi et al., J Pharmacol Exp Ther. 1999 May;289(2):768-73).
