Fig. 3From: Analysis of secondary structural elementsĀ in human microRNA hairpin precursorsComparison of motif types found in human miRNA precursors, highly expressed human RNAs, and RNAs with known structures from various organisms. (a) plot of the number of each secondary structural motif in human miRNA precursors including 3ā bulges (nā=ā924), 5ā bulges (nā=ā1089), internal loops (nā=ā3860), hairpins (nā=ā1546), and multibranch loops (nā=ā17). (b) plot of the percentage of each motif within its motif type (for example, the percentage of 1-nucleotide bulges of total bulges). (c) plot of the percentage of each motif. Total motifs: human miRNA precursor, nā=ā7436; highly expressed human RNAs, nā=ā2712; all other RNAs, nā=ā26,213; *, p <0.05; **, p <0.01; ***, pā<ā0.001Back to article page