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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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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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description	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.
doi_str_mv	10.1038/240225a0
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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
title	Genes Coding for Polysomal 9S RNA of Sea Urchins: Conservation and Divergence
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