2ixy is a 1 chain structure. Full experimental information is available from OCA.
Reference
Flodell S, Petersen M, Girard F, Zdunek J, Kidd-Ljunggren K, Schleucher J, Wijmenga S. Solution structure of the apical stem-loop of the human hepatitis B virus encapsidation signal. Nucleic Acids Res. 2006;34(16):4449-57. Epub 2006 Aug 31. PMID:16945960 doi:gkl582
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