A single vegetative actin isovariant overexpressed under the control of multiple regulatory sequences is sufficient for normal Arabidopsis development.

@article{Kandasamy2009ASV,
  title={A single vegetative actin isovariant overexpressed under the control of multiple regulatory sequences is sufficient for normal Arabidopsis development.},
  author={Muthugapatti M. Kandasamy and Elizabeth C McKinney and Richard Brian Meagher},
  journal={The Plant cell},
  year={2009},
  volume={21 3},
  pages={701-18}
}
The relative significance of gene regulation and protein isovariant differences remains unexplored for most gene families, particularly those participating in multicellular development. Arabidopsis thaliana encodes three vegetative actins, ACT2, ACT7, and ACT8, in two ancient and highly divergent subclasses. Mutations in any of these differentially expressed actins revealed only mild phenotypes. However, double mutants were extremely dwarfed, with altered cell and organ morphology and an… CONTINUE READING

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