The Drosophila E93 gene from the 93F early puff displays stage- and tissue-specific regulation by 20-hydroxyecdysone.

@article{Baehrecke1995TheDE,
  title={The Drosophila E93 gene from the 93F early puff displays stage- and tissue-specific regulation by 20-hydroxyecdysone.},
  author={Eric H. Baehrecke and Carl S Thummel},
  journal={Developmental biology},
  year={1995},
  volume={171 1},
  pages={85-97}
}
Pulses of ecdysteroids induce dramatic changes in gene expression that direct the early stages of Drosophila metamorphosis. This gene activity is reflected by the appearance of early and late puffs in the salivary gland polytene chromosomes. Curiously, the early puff genes that have been studied to date are induced by both the late larval and prepupal pulses of ecdysteroids and are expressed in many ecdysteroid target tissues, raising the question of how the hormone directs the complex stage… CONTINUE READING

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