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To study evolution of dinucleotide simple sequence repeats (diSSRs) we searched recently available mammalian genomes for UTR-localized diSSRs with conserved upstream flanking sequences (CFS). There were 252 reported Homo sapiens genes containing the repeats (AC)n, (GT)n, (AG)n or (CT)n in their UTRs including 22 (8.7%) with diSSR-upstream flanking sequences conserved comparing divergent mammalian...
New genome sequence information was used to study evolution of 22 dinucleotide simple sequence repeat (diSSR) sites whose upstream flanking sequences were shown to be conserved comparing Homo sapiens with the marsupial, Monodelphis domestica. Among mammals, most of these diSSR sites were conserved both upstream and downstream of the diSSR. However, individual diSSRs were frequently replaced by alternative...
We previously demonstrated that many “weak-folding” simple repeats were replaced during evolution by alternative weak-folding repeats. This suggested repeat selection at the level of higher order structure potential. Here, we demonstrate similar phenomena for “strong-folding” simple repeats in non-coding DNA. The Rabgap1 gene’s 3′ UTR contained the self-complementary repeat (AT)n in Homo sapiens but,...
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