Carnitine transport in A549 and BEAS-2B cells is operated by the high affinity OCTN2.
Carnitine transport in Calu-3 and NCl-H441 cells is operated by OCTN2 and ATB0,+.
ATB0,+ activity leads to high intracellular concentrations of carnitine.
ATB0,+ could provide cells with carnitine in patients carrying OCTN2 mutations.