mature_miRNA miRNA* pre-miRNA EST_contig mismatches bulges arm species source_database RFAM_best_hit RFAM_lowest_evalue miRBase_best_hit miRBase_lowest_evalue folding_energy secondary_structure TGAGGTAGTAGGTTGTATAGT TATACAATGTGCTAGCTTTCT TCTGGCAAATTGAGGTAGTAGGTTGTATAGTAGTAATTATTCAATCATACTATACAATGTGCTAGCTTTCTTTGCTTGA 3 0 5' arm Drosophila_willistoni mirbase let-7 1e-33 der-let-7 5e-30 -30.36 ((.((((((..(((.(((((.(((((((((((...............))))))))))).))))).)))..)))))).)) (-30.36)