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Model Organisms

The VT GAL4, LexA, and split-GAL4 driver line collections for targeted expression in the Drosophila nervous system

Researchers now at Janelia generated over 18,000 driver lines (the VT collection) that exploit the GAL4, LexA, and split-GAL4 systems to express transgenes in distinct and highly specific cell types in Drosophila. In addition, approximately 1,000 of the most useful VT GAL4 lines are available from the Vienna Drosophila Resource Center.

Hemidriver Drosophila Lines ("Split-halves")

The ability to reproducibly target the expression of transgenes to small, defined subsets of cells is a key experimental tool for understanding many biological processes. Unfortunately, the Drosophila nervous system has thousands of distinct cell types, and it has generally not been possible to limit expression to one or a few cell types with standard fly lines. Instead, intersectional methods can achieve the desired specificity by allowing expression of the transgene only where two different enhancers overlap in their expression patterns.