Botulinum toxin
![](/Images/godic/202501/01/Botulinum_toxin_3BTA3139.png")
![Target molecules of botulinum neurotoxin (abbreviated BoNT) and tetanus neurotoxin (TeNT), toxins acting inside the axon terminal, after
Barr et al.[42]](/Images/godic/202501/01/Presynaptic_CNTs_targets.svg3140.png")
Botulinum toxin (BTX) is a neurotoxic protein produced by the bacterium Clostridium botulinum and related species. It is also produced commercially for medical, cosmetic, and research use. There are two main commercial types: botulinum toxin type A and botulinum toxin type B.