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Neighbor-joining condensed tree of aligned MbeC homologues. MbeC-like proteins linked to MOBHEN or MOBP relaxases are enclosed by a rectangle. The NLNQ motif associated with each clade is indicated at the right of the figure. The group of elements lacking this motif is gray shaded. When MbeC-like protein is contained in a conjugative plasmid, the element is underlined. An asterisk is placed after plasmids having a truncated relaxase.
