Chroococcidiopsis and heterocyst-differentiating cyanobacteria are each other's closest living relatives.

@article{Fewer2002ChroococcidiopsisAH,
  title={Chroococcidiopsis and heterocyst-differentiating cyanobacteria are each other's closest living relatives.},
  author={David Fewer and Thomas Friedl and Burkhard B{\"u}del},
  journal={Molecular phylogenetics and evolution},
  year={2002},
  volume={23 1},
  pages={82-90}
}
Many filamentous cyanobacteria reduce atmospheric nitrogen in specialized differentiated cells called heterocysts. Here we present evidence that shows that members of the unicellular non-heterocyst-differentiating genus Chroococcidiopsis and the filamentous heterocyst-differentiating cyanobacteria are each other's closest living relatives. Distance, maximum-parsimony, and maximum-likelihood analyses of complete small subunit ribosomal RNA gene sequences yielded highly congruent support for the… CONTINUE READING

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