title: Phylogenetic structure of the prokaryotic domain: the primary kingdoms.
abstract: A phylogenetic analysis based upon ribosomal RNA sequence characterization reveals that living systems represent one of three aboriginal lines of descent: (i) the eubacteria, comprising all typical bacteria; (ii) the archaebacteria, containing methanogenic bacteria; and (iii) the urkaryotes, now represented in the cytoplasmic component of eukaryotic cells.
mesh_terms: D001419:Bacteria / Q000145:classification; D002477:Cells; D005057:Eukaryotic Cells; D010641:Phenotype; D010802:Phylogeny; D011387:Prokaryotic Cells
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