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Secondary structure conservation of R2 3' ends. (A) RNA sequence from the 3' UTR of the R2 element from Drosophila willistoni folded into the secondary structure modeled for other Drosophila R2 [28]. Nucleotides identical to those found to be conserved in the previous report are boxed. (B) The 3' end sequence from R2Dwi_SIDE folded into the same secondary structure. Nucleotide differences relative to R2Dwi are circled in blue. Boxed nucleotides are as in (A).
