FIGURE 4.
Mature miRNAs are frequently edited. (A) Distribution and frequency of RNA–DNA mismatch positions in canonical mature miRNA and ±3 bases up- and downstream. Editing frequency and Shannon entropy, a measure of DNA diversity, were averaged over miRNAs with editing in the corresponding position. Editing frequencies correlated well with entropy (R2 = 0.82), indicating that higher editing frequency is associated with greater diversity in the edited position. (B) Editing frequency of miRNAs. (C) Distribution of RNA–DNA mismatches separately for the seed region, anchor sequence, and 3′-tail.