Figure 7.

 Independent activities of the IAB5 and NEE enhancers. Transgenic embryos carry the P-transformation vector shown in the diagram and are oriented as described in the previous legends to the figures. This synthetic gene complex contains three different reporter genes, white, CAT, and lacZ. The white and CAT genes are driven by the mini-white promoter, whereas lacZ contains the eve promoter. All three reporter genes exhibit robust expression in the lateral neurogenic ectoderm, indicating that the NEE enhancer interacts equally well with the mini-white and eve promoters. In contrast, lacZ is strongly activated in the presumptive abdomen (C), whereas white and CAT exhibit little or no expression in this region (A,B).