3R2D:
reference: Structural basis for RNA recognition by NusB and NusE in the initiation of transcription antitermination., Stagno JR, Altieri AS, Bubunenko M, Tarasov SG, Li J, Court DL, Byrd RA, Ji X, Nucleic Acids Res. 2011 Jun 7. PMID: 21652641

This OCA Structure page
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