6BOG:
reference: Structure of RapA, a Swi2/Snf2 protein that recycles RNA polymerase during transcription., Shaw G, Gan J, Zhou YN, Zhi H, Subburaman P, Zhang R, Joachimiak A, Jin DJ, Ji X, Structure. 2008 Sep 10;16(9):1417-27. PMID: 18786404

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