Movie S1.

Z stacks of confocal sections (each of depth = 0.8 μm) of wild-type w1118 wing discs depicting the surface staining (Fig. 1A, step 1) of FLAER (blue), Wg (red), and DFz2 (green) from apical planes to basal planes. (Scale bar, 50 μm.) Movie is played at 10 frames per second.