Figure 8. The apparent diffusion constant and the size of equilibrating rhodopsin fraction do not correlate. Data are obtained on 29 salamander ROSs, each point marks an individual cell. Filled circles represent recordings in Ringer pH 6.3. Empty circles indicate Ringer pH 7.5+50 mM hydroxylamine. Linear regression line drawn through pooled data has a slope of −0.4±0.65 (mean±SEM). Similar results were obtained on frog and toad rods.