4DZS:
reference: Patterns and plasticity in RNA-protein interactions enable recruitment of multiple proteins through a single site., Valley CT, Porter DF, Qiu C, Campbell ZT, Hall TM, Wickens M, Proc Natl Acad Sci U S A. 2012 Apr 17;109(16):6054-9. Epub 2012 Mar 30. PMID: 22467831

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