Comparison of miRTRAP with miRDeep. (a) miRTRAP out-performed miRDeep for the Ciona library data set, identifying approximately five times more miRs. In addition, it identified 11 mirtron/half-mirtrons, while miRDeep found only 1. (b) For the Drosophila small RNA data set, miRTRAP identified 25 more known fly miRs than miRDeep. In particular, miRTRAP found 12 out of 14 mirtrons, while miRDeep identified only 3. (c) Example of a novel Drosophila mirtron predicted by miRTRAP. (d) A novel Drosophila miR/miR* containing locus predicted by miRTRAP.