5JJI:
reference: Molecular mechanisms of substrate-controlled ring dynamics and substepping in a nucleic acid-dependent hexameric motor., Thomsen ND, Lawson MR, Witkowsky LB, Qu S, Berger JM, Proc Natl Acad Sci U S A. 2016 Nov 29;113(48):E7691-E7700. Epub 2016 Nov 16. PMID: 27856760

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