Figure 4.
The effect of Pi at low pH on Vactin. In vitro motility actin filament velocities from chicken skeletal myosin and actin under various levels of pH and Pi. Values represent mean ± SEM for Vactin at each pH and Pi level. Data were analyzed using a two-way ANOVA, * indicates significantly (p < 0.05) different from 0 mM Pi and # indicates a significant interaction, meaning that the increase in Vactin in response to Pi was greater at both pH 6.8 and 6.5 than at 7.4. Figure from Debold et al. (2011), reprinted with permission from the American Physiological Society.