2M3K:
reference: Specific DNA recognition mediated by a type IV pilin., Cehovin A, Simpson PJ, McDowell MA, Brown DR, Noschese R, Pallett M, Brady J, Baldwin GS, Lea SM, Matthews SJ, Pelicic V, Proc Natl Acad Sci U S A. 2013 Feb 5. PMID: 23386723

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