ABCA4 and Stargardt disease: The albino Abca4−/− mice, an animal model of Stargardt’s disease, used herein had a atRAL level similar to that of wild-type mice in adulthood (6–7 months) but had significantly lower 11cRAL levels and accumulated A2E faster, according to a recent report (Supplementary Fig. S1a, S1b)30–32.