4EC6:
reference: The 2.5 A Structure of the Enterococcus Conjugation Protein TraM resembles VirB8 Type IV Secretion Proteins., Goessweiner-Mohr N, Grumet L, Arends K, Pavkov-Keller T, Gruber CC, Gruber K, Birner-Gruenberger R, Kropec-Huebner A, Huebner J, Grohmann E, Keller W, J Biol Chem. 2012 Nov 27. PMID: 23188825

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