The Life-Cycle of Operons (original) (raw)
Figure 6
Reconstructed Histories of Three Dead Operons
For each dead operon pair, we show the gene order and the predicted or known operon structure in E. coli K12 and its relatives. The amount of spacing between genes is not shown. The trees show the branching order of the species according to the tree in Figure 2. We also show a parsimonious reconstruction of events, marked by “+” and “−” on the branches and the labels at right. Genes that are essential for growth in rich media (from [79]) are marked with an asterisk (*).