Fig. 5. phyl acts upstream of ttk and downstream of N. (A,B) Adult nota of Eq-GAL4/UAS-ttk69 (A) and UAS-phyl/+; Eq-GAL4/UAS-ttk69 (B). (C) A101 expression in Eq-GAL4/UAS-ttk69 pupal notum. Most of A101-positive cells were missing. (D) Adult notum with a phyl² mutant clone (clone boundary is indicated by black lines). (E) Notum of N^ts flies. (F) Adult notum of N^ts with a phyl² mutant clone (clone boundary is marked with black lines). Most bristles in the mutant clone were missing. (G-L) Anti-Elav staining of the embryonic abdominal hemisegments. (G) Wild type, (H) ttk^osn/ttk^osn mutant, (I) phyl¹/phyl²; ttk^osn/ttk^osn double mutant. Neuron overproduction was observed in both mutant embryos (H,I). (J) N^ts; phyl¹/phyl² double mutant at 17°C. (K) N^ts mutant at 32°C. (L) N^ts; phyl¹/phyl² double mutant at 32°C.