Figure 4.

Dose dependence of methyl p-hydroxybenzoate-induced net Ca²⁺ release from rabbit skeletal muscle terminal cisternae. Experiments were carried out as described in Figure 1. (a): Ca²⁺ release was stimulated by the addition of the indicated concentrations of 4 mM methyl p-hydroxybenzoate. The traces are representative of experiments carried out six separate times. (b) Increasing concentrations of methyl p-hydroxybenzoate were added to terminal cisterane in order to obtain the initial rate of Ca²⁺ release. Results are the mean±standard deviation of four experiments.