1U6F:
reference: NMR Structural Study of TcUBP1, a Single RRM Domain Protein from Trypanosoma cruzi: Contribution of a beta Hairpin to RNA Binding(,)., Volpon L, D'Orso I, Young CR, Frasch AC, Gehring K, Biochemistry 2005 Mar 15;44(10):3708-3717. PMID: 15751947

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