Genes Coding for Polysomal 9S RNA of Sea Urchins: Conservation and Divergence

The DNA sequences coding for the individual major subfractions of the putative histone mRNAs are all 1,200-fold reiterated and are contained in a “cryptic” density satellite in Psam-mechinus DNA. While random mutational drift cannot be detected in the 9S mRNA coding sequences within the species, it...

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Bibliographic Details
Published in:Nature (London) 1972-11, Vol.240 (5378), p.225-228
Main Authors: WEINBERG, E. S, BIRNSTIEL, M. L, PURDOM, I. F, WILLIAMSON, R
Format: Article
Language:English
Subjects:
Animals
Biological Evolution
Centrifugation, Density Gradient
DNA
Electrophoresis, Polyacrylamide Gel
Genetic Code
Histones - biosynthesis
Humanities and Social Sciences
Molecular Weight
multidisciplinary
Nucleic Acid Hybridization
Polyribosomes - metabolism
Ribonucleases - metabolism
RNA, Messenger - biosynthesis
RNA, Messenger - isolation & purification
RNA, Messenger - metabolism
RNA, Ribosomal - biosynthesis
RNA, Ribosomal - isolation & purification
RNA, Ribosomal - metabolism
Science
Science (multidisciplinary)
Sea Urchins - metabolism
Species Specificity
Tritium
Uridine - metabolism
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Summary:The DNA sequences coding for the individual major subfractions of the putative histone mRNAs are all 1,200-fold reiterated and are contained in a “cryptic” density satellite in Psam-mechinus DNA. While random mutational drift cannot be detected in the 9S mRNA coding sequences within the species, it is very much in evidence during the evolution of two related sea urchin species.
ISSN:0028-0836
1476-4687
DOI:10.1038/240225a0