Eye regeneration assay reveals an invariant functional left-right asymmetry in the early bilaterian, Dugesia japonica.

@article{Nogi2005EyeRA,
  title={Eye regeneration assay reveals an invariant functional left-right asymmetry in the early bilaterian, Dugesia japonica.},
  author={Taisaku Nogi and Yan Emily Yuan and Debra A. Sorocco and Ricardo P{\'e}rez-T{\'o}mas and Michael Levin},
  journal={Laterality},
  year={2005},
  volume={10 3},
  pages={193-205}
}
Consistent visceral asymmetry in vertebrates raises fascinating questions about the developmental mechanisms and evolutionary origin of fixed chirality of the left-right axis. One persistent controversy is whether consistently biased asymmetry is a later innovation imposed on a bilaterally symmetrical primitive body-plan, or whether asymmetry is a fundamental property predating the bilateria. The morphology of planaria suggests proximity to the origin of the bilateral body-plan, and they are… CONTINUE READING