Figure 1.

Schematic illustration of the reporter gene constructs. The upstream regulatory sequences of three genes with tissue-specific expression were cloned individually into a transposable element vector containing the lacZ reporter gene and the mini-white marker gene. The genes CG2175, CG8982 and CG15406 show highly enriched expression in ovary, accessory gland and Malpighian tubule, respectively. The terminal sequences of the P-element (P) represent the boundaries of the DNA fragment that is inserted into the genome.