Abstract
The Q-system is a repressible binary expression system for transgenic manipulations in living organisms. Through protein engineering and in vivo functional tests, we report here new variants of the Q-system transcriptional activator, including QF2, that allows the Q-system to drive strong and ubiquitous expression for the first time in all tissues. Our new QF2, GAL4QF and LexAQF chimeric transcriptional activators substantially enrich the toolkit available for transgenic regulation in Drosophila.
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