Synaptic vesicle glycoprotein 2B is a protein that in humans is encoded by the SV2B gene.Probably plays a role in the control of regulated secretion in neural and endocrine cells.By similarity (Microbial infection) Receptor for the C.botulinum neurotoxin type A2 (BoNT/A, botA); glycosylation is not essential but enhances the interaction . Probably also serves as a receptor for the closely related C.botulinum neurotoxin type A1.