Conserved intragenic elements were critical for the evolution of the floral C-function.

@article{Causier2009ConservedIE,
  title={Conserved intragenic elements were critical for the evolution of the floral C-function.},
  author={Barry Causier and Desmond Bradley and Holly Cook and Brendan H Davies},
  journal={The Plant journal : for cell and molecular biology},
  year={2009},
  volume={58 1},
  pages={41-52}
}
The floral C-function, which specifies stamen and carpel development, played a pivotal role in the evolution of flowers. An important aspect of this was the establishment of mechanisms regulating the temporal and spatial expression domain of the C-function genes. Transcription of the Arabidopsis C-function gene AGAMOUS (AG) is tightly controlled by factors that interact with cis-elements within its large second intron. Little is known about the regulatory role of intragenic elements in C… CONTINUE READING
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