Genetic structure of the abd-A gene of Drosophila.

We report the embryonic and adult phenotypes of a number of mutations of the abd-A gene of the bithorax complex. Some of them result in loss of abd-A function in the whole abd-A domain and are usually lethal. These probably eliminate or inactivate abd-A protein products. Other mutations affect only ...
part of the abd-A domain. These are viable, appear to map outside the abd-A transcription unit, and presumably alter the normal spatial regulation of abd-A products. We propose a model of abd-A structure based on a protein-coding region and two cis-regulatory regions. Regulatory region 1, 3' to the transcription unit, contains positive and negative regulatory elements. Regulatory region 2, 5' to the transcription unit, establishes the correct level of abd-A activity in the abdominal metameres.
Mesh Terms:
Animals, Chromosome Mapping, Drosophila, Gene Expression Regulation, Genes, Genes, Homeobox, Genetic Complementation Test, Mutation
Development
Date: Nov. 01, 1989
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