Figure 6From: The origin of a novel gene through overprinting in Escherichia coliStatistic analysis. Distribution of Chi-square values of relative rate tests against distance of out-group sequence (O) to node C. Black dots correspond to the first 408 nucleotides of yaaW and crosses correspond to the rest of the gene. The 0.005 and 0.001 significance levels are indicated with dotted lines.Back to article page