TABLE 2.

Summary of actomyosin ATPase activity

Values marked with* are significantly different from the control values (p < 0.05).

Tn	ATPase pCa50a	ATPase Ca2+ sensitivity	Hill coefficient	Maximal ATPase activityb	Minimal ATPase activityc
		μm
Control	5.81 ± 0.03	1.6 ± 0.1	1.18 ± 0.09	0.037 ± 0.003	0.0072 ± 0.0006
TnI R192H	6.29 ± 0.03*	0.52 ± 0.04*	1.1 ± 0.1	0.029 ± 0.003	0.0110 ± 0.0008*
TnC S69D	5.27 ± 0.07*	5.6 ± 0.9*	1.0 ± 0.2	0.035 ± 0.003	0.010 ± 0.002
TnI R192H-TnC S69D	5.84 ± 0.09	1.5 ± 0.3	0.83 ± 0.08*	0.038 ± 0.002	0.012 ± 0.001*

^a The Ca²⁺ concentration at half-maximal ATPase activity.

^b Maximal ATPase activity [mol of phosphate s⁻¹ (mol of S1)⁻¹].

^c Minimal ATPase activity [mol of phosphate s⁻¹ (mol of S1)⁻¹].