Figure 3.

Rate of ATP production/use by the frog skeletal muscle F₁F₀-ATP synthase/-ATPase under energized and de-energized conditions in normoxia and anoxia. The experimental conditions are described in Materials and Methods. The energized condition in normoxia and anoxia is represented by “normoxia (S3)” and “anoxia” respectively. The de-energized condition in normoxia and anoxia is represented by “normoxia + F” and “anoxia + F” respectively. Data are means ± SEM; n = 3 for “normoxia (S3),” “normoxia + F,” and “anoxia + F;” n = 6 for “anoxia.” Statistical differences between experimental conditions are represented by different letters (P < 0.05; one way ANOVA and a posteriori test of Tukey).