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Evolutionary conservation of DNA sequences expressed in sea urchin eggs and early embryos

Roberts, John W. and Johnson, Steven A. and Kier, Porter and Hall, Terrence J. and Davidson, Eric H. and Britten, Roy J. (1985) Evolutionary conservation of DNA sequences expressed in sea urchin eggs and early embryos. Journal of Molecular Evolution, 22 (2). pp. 99-107. ISSN 0022-2844. doi:10.1007/BF02101688.

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DNA sequence divergence measurements indicate that Strongylocentrotus franciscanus is more distinct from S. purpuratus and S. drobachiensis than these two species are from each other, in agreement with paleontological and morphological evidence. The evolutionary divergence of several classes of expressed DNA sequences was compared with that of total single-copy DNA. Between S. franciscanus and S. purpuratus the divergence of cDNA made from gastrula cytoplasmic poly(A)+ RNA is about half that of total single-copy DNA. Similar results were obtained for cDNA made from unfertilized egg poly(A)+ RNA. In contrast, sequences expressed in gastrula nuclear RNA have diverged almost as much as total single-copy DNA.

Item Type:Article
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Johnson, Steven A.0000-0001-9397-4768
Additional Information:© 1985 Springer. Received January 29, 1985 / Revised April 24, 1985. This research was supported by an NIH grant (HD05753). Terrence J. Hall was supported by NIH Postdoctoral Fellowships (GM06575; GM07401).
Funding AgencyGrant Number
NIH Postdoctoral FellowshipGM-06575
NIH Postdoctoral FellowshipGM-07401
Subject Keywords:mRN;A egg RNA; Nuclear RNA; Sequence divergence; Thermal stability
Issue or Number:2
Record Number:CaltechAUTHORS:20151217-183243524
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:63052
Deposited By: George Porter
Deposited On:29 Jan 2016 15:55
Last Modified:10 Nov 2021 23:11

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