5TDJ:
reference: Structural insights into RNA duplexes with multiple 2'-5'-linkages., Shen F, Luo Z, Liu H, Wang R, Zhang S, Gan J, Sheng J, Nucleic Acids Res. 2016 Dec 29. pii: gkw1307. doi: 10.1093/nar/gkw1307. PMID: 28034958

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