4AG5:
reference: Structure of the VirB4 ATPase, alone and bound to the core complex of a type IV secretion system., Wallden K, Williams R, Yan J, Lian PW, Wang L, Thalassinos K, Orlova EV, Waksman G, Proc Natl Acad Sci U S A. 2012 Jul 10;109(28):11348-53. Epub 2012 Jun 27. PMID: 22745169

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