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Figure 4


Fig. 4. Fab-8 is not able to substitute for Fab-7. (A-C) Cuticles were prepared from adult males (note that A7 does not contribute to any visible cuticle structures in the adult male). (A) Wild-type: the A6 sternite is recognizable by the absence of bristles (black arrow). (B) In Fab-72 homozygote males, A6 is partially transformed into A7 as revealed by the reduction of the A6 tergite (Mihaly et al., 1997). (C) In F7->F8 males, the transformation of A6 to A5 is visible on the sixth sternite, which exhibits an A5 shape and has bristles (black arrow). (D) Diagram of the F7->F8 substitution. (E-G) Abd-B expression in the embryonic CNS. (E) Wild-type. (F) Fab-72: the Abd-B expression level in PS11 increases to the level normally observed in PS12. (G) F7->F8: the Abd-B expression level in PS11 decreases to a level similar to that seen in PS10.





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