The effects of YcdT and YdeH on motility. Motility was analysed by measuring the diameter of the swimming zone on 0.3 % agar plates, supplemented with 0.1 % arabinose, if necessary. (A) MG1655 (wt), carrying pBAD28, pBADycdT, pBADycdT-mut, pBADydeH, pBADydeH-mut or pBADcsrA. (B) Salmonella Typhimurium strain MAE103, carrying pBAD28, pBADycdT, pBADycdT-mut, pBADydeH, pBADydeH-mut or pBADcsrA. (C) MG1655 (wt) and mutants XWMGΔT (ycdT), KJ295 (ydeH) and the double mutant KJ311 (ycdT ydeH). (D) MG1655 and mutants TRMG (csrA), KJ331 (csrA ycdT), KJ330 (csrA ydeH) and KJ369 (csrA ycdT ydeH). A representative image of a motility agar plate for MAE103 carrying pBAD28, pBADycdT, pBADydeH or pBADcsrA is illustrated. All motility assays were repeated at least two times independently and the mean and the standard deviation were calculated.