1RKJ:
reference: Solution structure of the complex formed by the two N-terminal RNA-binding domains of nucleolin and a pre-rRNA target., Johansson C, Finger LD, Trantirek L, Mueller TD, Kim S, Laird-Offringa IA, Feigon J, J Mol Biol 2004 Apr 2;337(4):799-816. PMID: 15033352

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