The presumptive R7 cell of the developing Drosophila eye receives positional information independent of sevenless, boss and sina.

@article{Mlodzik1992ThePR,
  title={The presumptive R7 cell of the developing Drosophila eye receives positional information independent of sevenless, boss and sina.},
  author={Marek Mlodzik and Yasushi Hiromi and Corey S. Goodman and Gerald M. Rubin},
  journal={Mechanisms of development},
  year={1992},
  volume={37 1-2},
  pages={37-42}
}
Studies on the development of the R7 photoreceptor in the Drosophila eye thus far have identified three genes that specifically affect this cell: sevenless, boss and sina. In each of these mutants the R7 precursor develops instead as the equatorial cone cell (EQC). We have isolated an enhancer trap line, H214, in which beta-galactosidase is primarily expressed in the R7 cell throughout its development. In mutations of sevenless, boss and sina, expression in H214 is initially reduced although… CONTINUE READING

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