Fig. 2.

Bar graph with standard deviations indicated by error bars, showing the fold change in gene expression levels relative to the reference gene during hlyF expressing and non-expressing conditions, according to the Pfaffl equation. An overall down regulation for ompF can be observed for the three time intervals, while ompA stays constant until a period between 8 and 24 hours is reached, leading to strong upregulation of the gene.