Fig. 13.

Comparison of physiological τ data with t₆₃ data predicted by the mathematical model. The physiological data are taken from Fig. 6; note that here we report the means ± standard deviation (and not SE, as in Fig. 6). An apparent inconsistency arises when we compare pH_S data from physiological experiments (time constant, τ) and simulations (time to 63% of completion, t₆₃) for CO₂ addition, under both CA II and control conditions. The inconsistency probably arises, in part, because of the multiexponential decay of the simulated pH trajectory, the special nature of the pH_S trajectory beneath the pH_S electrode, and the asymmetry of pH_S over the oocyte surface. Details of the mathematical model are presented in the third paper in this series (49).