Fig. 3.

Lengths of the intergenic regions of the divergently oriented mycobacterial TFTR regulators. The intergenic regions from the 422 divergently oriented regulators from M. tuberculosis (Mtb), M. avium paratuberculosis (MAP), M. marinum (MM), M. ulcerans (MUL), M. gilvum (MGIL) and M. smegmatis (MSM) were analysed for length. Each dot represents an intergenic region and the length is given on the y-axis. Each of the genes were assigned a number e.g. 1–33 for MTB, 34–97 for MAP, 98–174 for MM, 175–225 for MUL, 226–312 for MGIL and 313–422 for MSMEG. The assignation of number was done in gene number order in each organism e.g. 1 = Rv0067c, 2 = Rv0078, 3 = Rv0135c etc. and this is given on the x-axis. The line represents a cut-off intergenic region size of 200 bp. The graph shows that the majority of divergently oriented genes are separated from their neighbour by 200 bp or less