1AKG:
reference: Crystal structure at 1.1 A resolution of alpha-conotoxin PnIB: comparison with alpha-conotoxins PnIA and GI., Hu SH, Gehrmann J, Alewood PF, Craik DJ, Martin JL, Biochemistry. 1997 Sep 23;36(38):11323-30. PMID: 9298951

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