ISSN:
1432-1432
Keywords:
mRNA
;
egg RNA
;
Nuclear RNA
;
Sequence divergence
;
Thermal stability
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary DNA sequence divergence measurements indicate thatStrongylocentrotus franciscanus is more distinct fromS. purpuratus andS. 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. BetweenS. franciscanus andS. 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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02101688
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