title: Eubacterial origin of chlamydiae.
abstract: The sequence of the 16S rRNA gene from Chlamydia psittaci was determined. Comparison of this sequence with other 16S rRNA sequences showed the organism to be eubacterial. The organism represents a hitherto unrecognized major eubacterial group. However, this group may be peripherally related to the planctomyces and relatives. Although these two groups seem to have very little in common phenotypically (they have been studied in very different ways), cell walls in both cases contain no peptidoglycan.
mesh_terms: D005075:Biological Evolution; D002691:Chlamydophila psittaci / Q000235:genetics*; D004275:DNA, Ribosomal / Q000235:genetics; D004926:Escherichia coli / Q000235:genetics; D009690:Nucleic Acid Conformation; D012335:RNA, Ribosomal / Q000235:genetics; D012689:Sequence Homology, Nucleic Acid
chemical_list: D004275:DNA, Ribosomal; D012335:RNA, Ribosomal