The Polycomb group gene Posterior Sex Combs encodes a chromosomal protein.

@article{Martin1993ThePG,
  title={The Polycomb group gene Posterior Sex Combs encodes a chromosomal protein.},
  author={Elisabeth C. Martin and Paul N Adler},
  journal={Development},
  year={1993},
  volume={117 2},
  pages={641-55}
}
The Posterior Sex Combs (Psc) gene of Drosophila has been studied at the molecular level both because it is a Polycomb group (Pc-G) gene and hence required for the maintenance of segmental determination, and because it is the Drosophila homolog of the murine bmi-1 oncogene. Although genetic interactions indicated that Psc functioned as a Pc-G gene, the zygotic mutant phenotype of Psc showed little evidence of segmental transformations. We have examined mutant embryos derived from a mutant… CONTINUE READING

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