Four miRNA precursors that can generate multiple miRNA-like RNAs. (a-d). Three miRNA precursors with miRNA-like RNAs in the upper arms close to the loops of their hairpins (a, c, d), and a miRNA precursor with miRNA-like RNAs in the lower arm of its hairpin (b). Note that miRNA-miRNA* duplexes for miRNA-like RNAs, with approximately two-nucleotide 3'-end overhangs, appear on the miR159, miR169m and miR319b precursors. The previously annotated miRNAs were named as miRn.1 (see main text for detail) and those miRNA-like RNAs having less than four reads were not named. For clarity, miR169m.2* and miR319b.2* are also indicated though the numbers of reads mapped to them were below the cutoff threshold of 5.