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.