2LUB:
reference: NMR Studies of HAR1 RNA Secondary Structures Reveal Conformational Dynamics in the Human RNA., Ziegeler M, Cevec M, Richter C, Schwalbe H, Chembiochem. 2012 Sep 24;13(14):2100-12. doi: 10.1002/cbic.201200401. Epub 2012, Sep 7. PMID: 22961937

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