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Updated: Jun 4, 2026
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Laser Microdissection Applied to Gene Expression Profiling of Subset of Cells from the Drosophila Wing Disc
Published on: April 30, 2010
The GAL4 System: A Versatile Toolkit for Gene Expression in Drosophila
Tony D Southall1, David A Elliott, Andrea H Brand
1The Gurdon Institute and Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, United Kingdom.
CSH Protocols
|March 2, 2011
Summary
The GAL4 system enables ectopic gene expression in specific tissues of transgenic flies. This powerful genetic tool offers temporal control and has extensive resources available for researchers.
Area of Science:
- Genetics
- Molecular Biology
- Developmental Biology
Background:
- Ectopic gene expression complements traditional genetic studies by introducing gain-of-function phenotypes.
- The GAL4 system is a widely used method for targeted gene activation in Drosophila melanogaster.
Purpose of the Study:
- To provide an overview of the GAL4 system for ectopic gene expression.
- To highlight recent advancements and methods for generating and analyzing GAL4-mediated transgenic flies.
Main Methods:
- Utilizing the GAL4 system for selective activation of cloned genes.
- Employing distinct transgenic lines for GAL4 protein and target genes.
- Adapting the system for inducible expression with temporal control.
Main Results:
- The GAL4 system allows for tissue- and cell-specific gene expression patterns.
- Separation of GAL4 and target genes ensures silent gene expression until activation.
- Inducible modifications enhance temporal control over gene activity.
Conclusions:
- The GAL4 system is a versatile tool for gain-of-function studies in flies.
- Extensive GAL4 and reporter line resources are available to the research community.
- The system facilitates the generation and analysis of transgenic flies for ectopic expression studies.
