Isolation and reconstitution of the high‐affinity choline carrier

Abstract
Monoclonal antibodies, which block the high‐affinity uptake of choline in synaptosomal ghosts, have been used to purify a membrane polypeptide (80 kDa) from insect synaptosomal membranes. This isolated protein was found to catalyse the sodium‐dependent, hemicholinium‐sensitive accumulation of choline after reconstitution into liposomes, thus, apparently represents the high‐affinity choline transporter.