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. 1990 Apr;9(4):1199–1207. doi: 10.1002/j.1460-2075.1990.tb08227.x

Regulatory elements controlling expression of the Drosophila homeotic gene fork head.

D Weigel 1, E Seifert 1, D Reuter 1, H Jäckle 1
PMCID: PMC551796  PMID: 1969795

Abstract

The region-specific homeotic gene fork head (fkh) is expressed and required in a variety of tissues of the developing Drosophila embryo. In order to identify the cis regulatory elements directing the complex spatio-temporal expression pattern of fkh, we have studied the subpatterns directed by defined fragments of fkh genomic DNA. These experiments enabled us to distinguish separate regulatory elements specific for the different expression domains of fkh. In addition, our analysis revealed several unexpected features such as the redundancy of regulatory elements and the overlap of regulatory elements with the transcribed regions of other genes. Moreover, the separation of normally contiguous elements effecting expression in the posterior terminal fkh domain appears to lead to novel expression domains which do not correspond to known developmental units in the embryo.

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