| Literature DB >> 1861720 |
J Heemskerk1, S DiNardo, R Kostriken, P H O'Farrell.
Abstract
The engrailed gene product of Drosophila specifies the fate of a subset of cells in each segment. Our studies of engrailed regulation suggest that fate determination is an elaborate, multistep process. At the time in embryogenesis when the engrailed-dependent cell fate is probably determined, four modes of control act in an overlapping progression to govern engrailed expression. After activation by pair-rule genes, both an extracellular signal, wingless, and autoregulation are required for engrailed expression. Autoregulation graduates to wingless independence, but is transient, and is superseded by an engrailed-independent mode of maintenance.Entities:
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Year: 1991 PMID: 1861720 PMCID: PMC2755087 DOI: 10.1038/352404a0
Source DB: PubMed Journal: Nature ISSN: 0028-0836 Impact factor: 49.962