4J6W:
reference: Hfq binds ribonucleotides in three different RNA-binding sites., Murina V, Lekontseva N, Nikulin A, Acta Crystallogr D Biol Crystallogr. 2013 Aug;69(Pt 8):1504-13. doi:, 10.1107/S090744491301010X. Epub 2013 Jul 18. PMID: 23897473

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