Table 1.

Numerical values obtained from the statistical analysis of the motility cycle of wild-type, mclE⁻, and mhcA⁻ cell lines. The table lists the averages and standard deviations for each phase of the motility cycle as well as for the whole cycle. Values are given for cell length (L), cell aspect ratio (AR), cell speed (V), the translational component of area flux (AF_trans), the component of area flux attributable to deformation (AF_defor), the total duration of the motility cycle (T) and the duration of individual phases (T₁, T₄, T₃ and T₄), pole force (F_p), and strain energy (U_s). The number N of cells used for this statistical analysis: wild-type (N = 31), micE⁻ (N = 14), and mhcA⁻ (N = 27).

			L (μm)	AR	v (μm/min)	AFtrans (μm2/s)	AFdefor (μm2/s)	T (s)	Fp (pN)	Us (pN μm)
wild-type	Whole Cycle	mean	21.85	2.53	12.71	1.27	0.01	94.10	387.5	68.1
		std	4.51	0.66	3.12	0.41	0.10	29.15	305.6	94.6
	Protrusion	mean	22.14	2.56	15.11	1.65	0.65	22.01	404.5	73.4
		std	4.57	0.60	4.00	0.54	0.50	11.52	350.8	118.9
	Contraction	mean	24.88	3.14	14.40	1.38	−0.03	23.19	482.4	86.3
		std	5.14	0.80	4.19	0.59	0.26	14.00	448.0	121.0
	Retraction	mean	22.10	2.55	11.47	1.02	−0.56	22.93	393.5	64.4
		std	4.52	0.70	3.12	0.40	0.42	10.84	286.0	74.5
	Relaxation	mean	19.13	2.02	10.97	1.05	0.04	29.96	313.7	57.8
		std	3.64	0.52	2.65	0.35	0.21	14.93	235.4	88.9
mlcE-	Whole Cycle	mean	22.32	2.03	7.62	1.01	0.02	143.64	348.5	38.2
		std	3.31	0.29	2.30	0.36	0.09	36.22	132.9	19.1
	Protrusion	mean	22.34	2.02	8.55	1.14	0.41	32.80	344.3	38.5
		std	3.17	0.29	2.70	0.50	0.27	12.09	142.0	23.0
	Contraction	mean	24.76	2.39	8.50	1.13	−0.02	38.01	416.6	47.5
		std	2.98	0.35	2.58	0.40	0.18	7.75	162.1	25.9
	Retraction	mean	22.62	2.09	7.03	0.94	−0.31	39.30	363.1	40.4
		std	3.15	0.31	2.33	0.42	0.26	16.97	140.3	23.2
	Relaxation	mean	19.98	1.68	6.70	0.86	0.05	42.54	265.7	26.4
		std	3.55	0.29	2.23	0.39	0.11	18.76	119.2	14.4
mhcA-	Whole Cycle	mean	19.98	2.08	5.64	0.58	0.00	190.81	284.6	48.8
		std	5.72	0.39	1.68	0.33	0.04	83.29	159.9	50.0
	Protrusion	mean	20.47	2.16	7.21	0.87	0.41	35.50	302.8	53.1
		std	5.78	0.44	2.08	0.40	0.25	19.27	205.4	61.1
	Contraction	mean	22.95	2.54	6.27	0.61	−0.03	41.22	364.4	64.5
		std	6.41	0.53	1.93	0.31	0.15	21.10	222.0	59.8
	Retraction	mean	20.24	2.13	4.90	0.40	−0.21	50.01	281.8	47.0
		std	5.41	0.38	1.62	0.34	0.24	28.14	174.8	51.6
	Relaxation	mean	17.57	1.72	5.20	0.56	−0.02	58.81	241.6	40.0
		std	5.11	0.32	1.65	0.41	0.12	30.83	141.3	48.3