1N8M:
reference: Solution structure of Pi4, a short four-disulfide-bridged scorpion toxin specific of potassium channels., Guijarro JI, M'Barek S, Gomez-Lagunas F, Garnier D, Rochat H, Sabatier JM, Possani LD, Delepierre M, Protein Sci 2003 Sep;12(9):1844-54. PMID: 12930984

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