Abstract
Three trends are seen in the organization of ribosomal DNA genes during evolution: 1) gradual separation and separability of the regulation of transcription of 5S and larger subunit rRNAs; 2) retention of a transcription unit containing both large and small rRNAs; and 3) clustering of genes for both 5S and 18S-28S rDNAs, with the possible association of other 'non-rDNA' in the clusters of 18S-28S rDNA genes by the time mammals evolve.
Publication types
-
Comparative Study
-
Research Support, U.S. Gov't, Non-P.H.S.
-
Review
MeSH terms
-
Animals
-
Biological Evolution*
-
DNA, Ribosomal / genetics*
-
Escherichia coli / genetics
-
Mammals / genetics
-
RNA, Ribosomal / genetics*
-
RNA, Ribosomal, 16S / genetics
-
RNA, Ribosomal, 18S / genetics
-
RNA, Ribosomal, 23S / genetics
-
RNA, Ribosomal, 28S / genetics
-
RNA, Ribosomal, 5S / genetics
-
Transcription, Genetic
-
Yeasts / genetics
-
rRNA Operon / genetics*
Substances
-
DNA, Ribosomal
-
RNA, Ribosomal
-
RNA, Ribosomal, 16S
-
RNA, Ribosomal, 18S
-
RNA, Ribosomal, 23S
-
RNA, Ribosomal, 28S
-
RNA, Ribosomal, 5S