Effect of BMS on RPE maturation. (a) TEER value, (b) ZO-1 expression for tight junction, (c) ezrin expression for microvilli formation, (d) digested polystyrene beads for phagocytosis activity, (e) counted number of beads to nuclei ratios, (f) PEDF secretion for polarized secretion, and g) RPE65 formation for phototransduction in RPE cells on BMS or BM-ECM-coated Transwell (Transwell) at day 10. Scale bars: 20 μm (a,c,g), 5 μm (b). The error bars represent the standard deviation. The data were compared using Student’s t-test and differences were considered significant when ** for p < 0.01, and *** for p < 0.001 (n = 3).