FIG. 3.

The most parsimonious series of inversions for each of the multiple-inversion regions (Fig. 2). Each horizontal arrow represents a DNA block (not shown to scale) and its orientation. Blue and red indicate opposite replication orientations of the same block. The replication origin and terminus are marked by a small brown downward arrow. The green crossed double arrows stand for interreplichore inversions, and the orange crossed double arrows stand for intrareplichore inversions. The small red arrows (not shown to scale) on some of the blocks indicate rRNA operon locations.