1DL0:
reference: Discovery and characterization of a family of insecticidal neurotoxins with a rare vicinal disulfide bridge., Wang X, Connor M, Smith R, Maciejewski MW, Howden ME, Nicholson GM, Christie MJ, King GF, Nat Struct Biol 2000 Jun;7(6):505-13. PMID: 10881200

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