Ca_max 1 t D_Ca 0.15 0.3 2 t 0 t 0.3 D_Ca Ca_max 1 t D_Ca 0.65 0.7 2 t 0.3 D_Ca t D_Ca 0 k_1 Ca_t Total_Tn TnCa k_2 TnCa f TnCa Total_CB CB_on g CB_on f TnCa Total_CB CB_on g CB_on CB_on phi F F_max s L L_0 CumCB_on_end ATP epsilon FLA ATP_energy phi epsilon 1 g