Fig. 5.

The ATP hydrolysis rate during the length step experiment under the isometric contraction mode. a halfSL, b changes in F _bp (black) and F _bw (gray), c v _ATPase, d state deviation of total Ca²⁺ in the unbound state (black), [cAM _DPw] (dark gray), and [cAM _Ds] (light gray), e h _p (black) and h _w (grey). The notation of different phases of relaxation (F ₁–F ₄), are shown in b. [Ca²⁺] was 0.647 µM