By counting the additional mutations between the two pairs--38 in this case--and using their average mutation rate of about one per million years, the researchers concluded that the last common ancestor of all four birds must have lived more than 98 million years ago.
Second, polymorphism in the open reading frame results in an excess of non synonymous over synonymous mutations, with only two synonymous mutations observed for 15 non synonymous mutations between the two most divergent alleles [16].
Replication and transcription processes, during which one strand is transiently in a single-stranded state and thereby exposed to more DNA damage, has been widely considered to bias the occurrence of mutations between the two complementary DNA strands [9], [17].
Mutations between the two parental strains are accessible in the GenYeasTrait database previously described (http://genome.jouy.inra.fr/genyeastrait/[ 4]).
There were no differences in terms of NRTI and NNRTI-resistance associated mutations between the two subgroups (P > 0.05).
Analysis confirmed that these two genes shared a high degree of similarity having no more than eight mutations between the two different sopE1 alleles.
This is likely due to differences in the mutations between the two families and their effects on PIG-Y protein function.
The full protein sequences that we obtained as results for each query were used to identify mutations between the two strains.
The difference in UVB-type mutations between the two groups is not statistically significant P-value=0.571 P-value=0.571r sun exposure, sex adjustedtering within individuals).
By further examining the DNA sequence of these potential candidate regulators, we found that many of them have missense or promoter mutations between the two strains.
