The FLX gene of Arabidopsis is required for FRI-dependent activation of FLC expression.

@article{Andersson2008TheFG,
  title={The FLX gene of Arabidopsis is required for FRI-dependent activation of FLC expression.},
  author={Carol R. Andersson and Chris A. Helliwell and David J. Bagnall and Trijntje P Hughes and E. Jean Finnegan and W. James Peacock and Elizabeth S Dennis},
  journal={Plant & cell physiology},
  year={2008},
  volume={49 2},
  pages={191-200}
}
The Arabidopsis FLOWERING LOCUS C (FLC) gene encodes a MADS box protein that acts as a dose-dependent repressor of flowering. Mutants and ecotypes with elevated expression of FLC are late flowering and vernalization responsive. In this study we describe an early flowering mutant in the C24 ecotype, flc expressor (flx), that has reduced expression of FLC. FLX encodes a protein of unknown function with putative leucine zipper domains. FLX is required for FRIGIDA (FRI)-mediated activation of FLC… CONTINUE READING