6ES1:
reference: Crystal Structure of Botulinum Neurotoxin A2 in Complex with the Human Protein Receptor SV2C Reveals Plasticity in Receptor Binding., Gustafsson R, Zhang S, Masuyer G, Dong M, Stenmark P, Toxins (Basel). 2018 Apr 12;10(4). pii: toxins10040153. doi:, 10.3390/toxins10040153. PMID: 29649119

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