3E4H:
reference: Combined X-ray and NMR Analysis of the Stability of the Cyclotide Cystine Knot Fold That Underpins Its Insecticidal Activity and Potential Use as a Drug Scaffold., Wang CK, Hu SH, Martin JL, Sjogren T, Hajdu J, Bohlin L, Claeson P, Goransson U, Rosengren KJ, Tang J, Tan NH, Craik DJ, J Biol Chem. 2009 Apr 17;284(16):10672-83. Epub 2009 Feb 10. PMID: 19211551

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