FFN200 is a vesicular monoamine transporter 2 (VMAT2) substrate that selectively traces monoamine exocytosis in both neuronal cell culture and brain tissue.
This amino acids187 to 203 fragment is derived from the C-terminal helix of synaptosomal-associated protein of 25 kDa (SNAP-25). This peptide is able to rescue exocytosis from botulinum neurotoxin E (BoNT E)-treated cells, albeit at higher concentrations