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Fig. 7. upd is not required for the specification of stretched, centripetal or posterior follicle cells. upd mosaic follicles stained with Hoechst (DNA, white) and antibodies recognizing {pi}-MYC (upd+ cells, green) and FasIII (polar cells, red). (A) Stage 10B follicle with no upd+ anterior cells. The polar cells form (A, arrow) and the stretched (A', surface section, arrow) and centripetal (A'', internal section, arrow) cells are specified. (B) Stage 10B follicle with no upd+ cells at the posterior. The polar cells form (B, arrow), the oocyte is posteriorly localized, and the oocyte nucleus is at the anterior of the oocyte (B', arrow).