Figure 4From: Characterization of relationships between transcriptional units and operon structures in Bacillus subtilis and Escherichia coliDistributions of frequency of correlation coefficients of gene expression profiles between adjacent gene pairs. The upper figures are the distribution of correlation coefficients (A and C) and the bottom figures are their box plots (B and D). Blue, red and green lines indicate OPs, SOPs and NOPs, respectively.Back to article page