Figure 3From: Naturally occurring variations in sequence length creates microRNA isoforms that differ in argonaute effector complex specificityFrequency of extra 5' nucleotides. Several small Arabidopsis thaliana RNA datasets were analyzed for the occurrence of miRNAs with extra 5' nucleotides. From these datasets, 61% of the A. thaliana miRNAs listed in miRBase had no significant occurrence of extra nucleotides, 20% of the annotated miRNAs were not observed in the datasets at all, and 19% of miRNA had a significant proportion of either one (+1 MIR) or two (+2 MIR) nucleotides.Back to article page