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Fig. 4. Tracheal lumen morphology in fasII and ATP{alpha} mutants. (A-F) Lumens (A,B,D,E) and dorsal trunk cell shapes (C,F) visualised with anti-DE-cad of stage 16 fasIIeb112 (A-C) and Atp{alpha} mutants (D-F). (A,C,D,F) Dorsal views; (B,E) ventral views showing the ganglionic branches. (A,D) Embryos mutant for fasII and Atp{alpha} develop long and convoluted DTs reminiscent of those of grh mutants. Tubular dilations in the transverse connectives are indicated by asterisks. (B,E) The lumen of several branches is discontinuous (arrowheads at the GBs). In fasII, (C) and Atp{alpha} (F) mutants the apical cell surface appears elongated and expanded. Scale bar: 20 µm.