Fig 4. MrkH acts as repressor of mrk genes.
Transcriptional expression (qRT-PCR) of mrkI (A), mrkJ (B) and mrkA (C) genes overexpressing the MrkH protein at different L(+)-arabinose concentrations in the WT strain. D. Transcriptional expression (qRT-PCR) of mrkH and mrkI in the WT, Δhns, ΔmrkJ and Δhns ΔmrkJ backgrounds. E. Quantification of biofilm formation by measuring violet crystal uptake under overexpression of MrkH in the WT and ΔmrkJ mutant. Results represent the mean and standard deviations of three independent experiments performed. Statistically significant with respect to the WT strain: *p<0.05; **p<0.01; ***p<0.001.