Fig. 2. AbdA misexpression in the thoracic C1 lineage induces oenocytes. (A,B) Oenocyte precursors strongly express AbdA at stage 11 (A) but not stage 13 (B). (C) C1 (circled here and subsequently), labelled with anti-Rho, transiently expresses AbdA at stage 11. (D) Cartoon representing oenocyte precursors (red), chordotonal organ precursors C1-C3 (green), the tracheal pit (tp, green) and the dorsal Sal domain (pink) (Elstob et al., 2001) (E,F) Marking the C1-lineage with anti-Rho, reveals that sal-GAL4 and ato-GAL4 drive complementary expression of UAS-nlslacZ in the dorsal ectoderm including the oenocyte precursors (E) or in the C1 lineage (F) respectively. (G) ato-GAL4 driving UAS-abdA produces Alas-positive oenocytes in the thorax. (H) Numbers of thoracic oenocytes produced by misexpressing AbdA with the drivers indicated. This and subsequent graphs show the mean±1 s.d. for experimental (error bars) and wild-type abdominal counts (grey zone).