Table 2.

Reversal frequencies of wild-type M. xanthus and mgl and frzmotility mutants

ParameterStrain:
DK1622 (wild type)DK6204 (ΔmglAB)DK6206 (ΔmglB)DK9712 (frzD)DK9711 (frzE)DK9713 (ΔmglAB frzE)DK9714 (ΔmglAB frzD)
Average reversal frequency (min−1) (SD)0.17 (NDa)2.9 (1.4)1.8 (1.3)1.5 (1.1)<0.02 (NAb)2.7 (1.4)3.3 (1.1)
No. of reversals counted18439393140022256
Average speed (μm/min) (SD)c 4.4 (2.2)1.9 (1.1)2.6 (1.5)4.0 (2.3)4.3 (2.0)2.1 (1.4)1.9 (1.0)
% of cells exhibiting active movement (no. of cells evaluated)100 (250)88 (792)99 (412)100 (265)10 (272)85 (324)ND
  • a ND, not determined.

  • b NA, not applicable.

  • c For frzD mutant cells 3,187 speed values were collected, for frzE mutant cells 1,004 speed values were collected, and for ΔmglAB frzE double-mutant cells 2,927 speed values were collected. See the text for further description and details.