Chromosomal map of SSGs. Supercoiling-sensitive genes were mapped across the E. coli genome. Relaxation-induced genes are colored red and relaxation-repressed genes are in green. Genes are dispersed through the entire chromosome, making them good sensors for local changes of supercoiling of the chromosome.
Peter et al. Genome Biology 2004 5:R87 doi:10.1186/gb-2004-5-11-r87