| BoNT | botulinum neurotoxin | 
| SNARE | soluble N-ethylmaleimide-sensitive fusion protein attachment protein receptors | 
| HC | heavy chain | 
| LC | light chain | 
| SV | synaptic vesicle | 
| CME | clathrin-mediated endocytosis | 
| UFE | ultrafast endocytosis | 
| ADBE | activity-dependent bulk endocytosis | 
| vLC | VAMP1-3-targeted light chain | 
| sLC | SNAP-25-targeted light chain | 
| RRP | readily releasable pool |