Figure 3

Relational diagram of the replicon region of the three plasmids. Comparison of the replicon region of each plasmid reveals a complex structure of palindromic and/or iterative elements serving as node points for recombination events. Sequence segments are represented by thick horizontal lines joined by solid diagonal lines. The background striping highlights 'shared' versus 'unique' sequence segments as indicated by the text legend on the left hand side. Horizontal dashes are spacers to indicate a shorter length or lack of corresponding segment. Node points putatively involved in recombination events are represented by green circles; iterative and/or palindromic sequence units by half arrows; CDSs by rectangles, above the sequence line to indicate clockwise orientation, or below to indicate counter- clockwise orientation.