Fig. 8. Model for the relationship between Notch, EMC and EYA during oogenesis. Left: in polar/stalk precursors, an unknown pathway (X) inhibits expression of EMC. In the absence of EMC, EYA is reduced. Right: in main body precursors, Notch promotes EMC expression, and EMC promotes EYA expression, leading to either the establishment or maintenance of main body cell identity. In addition, EMC activity promotes differentiation.