Choline/H+ antiporter ( , ). Also acts as a high-affinity ethanolamine/H+ antiporter, regulating the supply of extracellular ethanolamine (Etn) for the CDP-Etn pathway, redistribute intracellular Etn and balance the CDP-Cho and CDP-Etn arms of the Kennedy pathway . Involved in membrane synthesis and myelin production .
Subcellular locations: Cell membrane, Mitochondrion outer membrane
Expressed in various cells of the hematopoietic system.