Table 2.

ATP consumption per volume and tension cost for V1 and V3

Parameter	V1 (αα)	V3 (ββ)	Ratio
ATPase activity per volume (mmol l−1 s−1)
LV + RV (n = 63)	0.39 ± 0.06	0.10 ± 0.01	3.9
LV (n = 35)	0.50 ± 0.09	0.10 ± 0.01	5.0
RV (n = 28)	0.33 ± 0.08	0.09 ± 0.01	3.7
Tension cost (mmol kN−1 m−1 s−1)
LV + RV (n = 63)	10.95 ± 1.17	2.28 ± 0.13	4.8
LV (n = 35)	12.99 ± 2.03	2.25 ± 0.19	5.8
RV (n = 28)	9.60 ± 1.21	2.27 ± 0.15	4.2

ATPase activity per volume and tension cost of the homodimers V1 (αα) and V3 (ββ), calculated from the regression lines between ATPase activity per volume and between tension cost and MHC composition. Intercept values of the different regression lines are given ± s.e.m.