TABLE 6.

Motility and flagellation of FS mutants

Strain	Time after resuspension in CBa
	0 h				4 h
	% Motileb	% Flagellatedc	No. of Flagella/celld	Avg flageller lengthe (μm)	% Motileb	% Flagellatedc
RMB7201	42	47	1.9	2.4	33	44
FS1	55	57	2.4	3.8	43	55
FS7	53	46	NDf	ND	35	44
FS44	53	51	ND	ND	35	46

^aCells from log-phase 1/10 TY cultures were washed and gently resuspended in CB. 

^bMotile-cell percentages are averages of counts from several fields and two independent cultures from a representative experiment. Averages from replicate aliquots normally varied by ±5%. 

^cFlagellated-cell percentages are averages of counts from about 60 to 100 cells on two separate grids from the same two independent cultures used for motile-cell percentage assays. Averages from replicate grids normally varied by less than 5%. 

^dAverage number of flagella per flagellated cell, determined from electron micrographs of at least 100 cells per strain on replicate grids. Values were reproducible within ± 10% between grids. 

^eAverage length of flagella per flagellated cell, determined by planimetry from micrographs of at least 50 cells per strain on replicate grids. 

^fND, not determined.