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Fig. 7 Role for Notch in the resolution of a mixed identity. (A-B″) Confocal sections of Tg(AANAT2:GFP) embryos at 48 hours, stained with a HuC/D antibody. Embryos were either mock treated (A-A″) or DAPT treated (B-B″) from 16 hours. Anterior is upwards. White arrowheads indicate double-labeled cells. (C) Average numbers of cells double-labeled for various projection neuron/photoreceptor marker combinations. In the case of HuC/D/Tg(AANAT2:GFP) + cells, the percent of double-labeled cells was calculated over the total number of cells expressing either marker. Numbers indicate average±s.d. **P<0.001; ***P<0.0005 using a t-test. nd, not determined.