Molecular Biology and Evolution, Vol 2, 399-410, Copyright © 1985 by Society for Molecular Biology and Evolution
HJ Elwood, GJ Olsen and ML Sogin
We have determined the complete nucleotide sequence of the small- subunit
ribosomal RNA genes for the ciliate protozoans Stylonychia pustulata and
Oxytricha nova. The sequences are homologous and sufficiently similar that
these organisms must be closely related. In a phylogeny inferred from
comparisons of several eukaryotic small-subunit ribosomal RNAs, the
divergence of the ciliates from the eukaryotic line of descent is seen to
coincide with the radiation of the plants, the animals, and the fungi. This
radiation is preceded by the divergence of the slime mold, Dictyostelium
discoideum.
ORIGINAL ARTICLE
The small-subunit ribosomal RNA gene sequences from the hypotrichous ciliates Oxytricha nova and Stylonychia pustulata
Department of Molecular and Cellular Biology, National Jewish Hospital, Denver, Colorado 80206.
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