“The … beta-NAD+ was frequency dependent … the presence of tetrodotoxin (TTX; 0.3 micromol/l), omega-conotoxin GVIA (50 nmol/l), and botulinum neurotoxin A (BoNT/A; 100 nmol/l), … in the presence of guanethidine (3 micromol/l), omega-agatoxin IVA (50 nmol/l), or charbachol (1 micromol/l).”