ClpX read counts. Example read counts for a 4kb region in the M. tuberculosis genome obtained from deep-sequencing of transposon insertion libraries. ClpX, the ATP-dependent specificity component of the CLP protease, contains a single insertion in the C-terminus. The 19 remaining TA sites are devoid of insertions, indicative of an essential gene. Figure created using IGV - distributed by the Broad Inst. http://www.broadinstitute.org/igv/.