FIG. 3.

Analysis of the importance of flu for the RfaH-dependent increased biofilm formation capacity of E. coli strain MG1655. (A) Biofilm development of K-12 strain MG1655 and its mutants in microfermentors after 48 h of growth at 37°C in M63B1 glucose medium. The images are representative images of the bottoms of the microfermentors and of the Pyrex spatulas on which biofilms formed. (B) Average results of at least four experiments plotted as a histogram. The error bars indicate standard errors of the means. The level of biofilm formed by wild-type strain MG1655 (wt) was defined as 100%.