Involved in acetylcholine transport into synaptic vesicles. Detected in most regions of the nervous system including the nerve ring, the ventral and dorsal nerve cords, and the pharyngeal nervous system (PubMed:8342028). Expressed in most cholinergic neurons (PubMed:8342028, PubMed:28244369). In addition, expressed in SIA, SIB and SMB sublateral motor neurons (PubMed:28244369). Newly hatched animals are small and coiled, do not grow or feed, can barely move and die within a few days. Belongs to the major facilitator superfamily. Vesicular transporter family.