Figure 2From: Adaptation of the short intergenic spacers between co-directional genes to the Shine-Dalgarno motif among prokaryote genomesObserved vs. expected co-directional spacing lengths. Red bars show the expected number of gene pairs separated by each spacing length. Blue bars show the observed number of gene pairs separated by each spacing length up to 50 bps among the co-directional spacing lengths.Back to article page