A set of transgenic insertion stocks derived by TE mobilization using the P-element construct P{GawB}. The P{GawB} construct carries a w+mW.hs mini-white visible marker and Scer\GAL4 driver/enhancer trap sequences. The GAL4-UAS system is a binary system using Scer\GAL4, a yeast transcription activator protein gene, and Scer\UAS, the DNA binding site for the GAL4 protein. The P{GawB} construct acts as an enhancer trap: expression of the GAL4 is sensitive to enhancers in the genomic region of an insertion. When paired with a construct or insertion carrying a reporter gene downstream of Scer\UAS, the reporter gene is driven by and reflects the expression of the GAL4.
The NP2788 marker is expressed in a small region of the adult middle midgut in the interstitial cells. The boundary of the NP2788 expression zone is the boundary between the copper cell region and the large flat cell region.
Location 2L:20313280-20313281 refined by FlyBase alignment of dbGSS accession AG218539 to D. melanogaster arm Release_4 and heterochromatin Release_3.2b. Insertion orientation revised.