ClaI genomic fragment containing 142bp of the Sry-β-janA intergenic region is fused to Ecol\lacZHsp70Bb.HZ50. Fragment corresponds to janA sequences from -175bp to -+3bp (where +1 refers to the janA transcription start site).
No EcollacZ expression was detected in flies where EcollacZ expression was driven by the -175 to -33 promoter region of janA (+1 is the transcription start site for janA).