Figure 4.

rnhA and recG deletions exacerbate the ΔtopA phenotype. (A) No white colonies are observed on minimal medium when ΔtopA is combined with either rnhA or recG. (B-C) Overexpression of topB in a ptopA+/topA recG background allows formation of white colonies. The overexpression of topB in ptopA+/topA rnhA cells has no effect

Stockum et al. BMC Microbiology 2012 12:26   doi:10.1186/1471-2180-12-26
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