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. 1987 Jan;6(1):207–214. doi: 10.1002/j.1460-2075.1987.tb04740.x

Developmental regulation by an enhancer from the Sgs-4 gene of Drosophila

Antony W Shermoen 1, Jill Jongens 1,1, Susan W Barnett 1, Kathleen Flynn 1, Steven K Beckendorf 1
PMCID: PMC553378  PMID: 16453749

Abstract

A cis acting regulatory region has previously been identified 300-500 bp upstream of the Drosophila glue protein gene, Sgs-4. The functional capabilities of this region have now been examined by fusing it to the Drosophila Adh gene and determining the pattern of expression from the fused construct after transformation. The results show that the Sgs-4 sequences between −150 and −568 are able to direct Adh expression in late third-instar salivary glands, the appropriate tissue and timing for Sgs-4 expression. In addition, the Sgs-4 sequence elevates Adh expression in the anterior midgut and fat body, despite the fact that Sgs-4 is not normally expressed there. All three regulatory activities, tissue specificity, timing and enhancement, show the positional flexibility of enhancer elements. In addition, the Sgs-4 and Adh regulatory elements combine to direct expression in novel spatial/temporal combinations in which neither would normally be expressed.

Keywords: tissue specific expression, P-element transformation, Adh regulation

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Selected References

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