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 TGAGGTAGTAGGTTGTATAG GTACAGCCTGCTAACTTTCC GTCTGTTTGAGGTAGTAGGTTGTATAGTAAGTATTACACCTATTGGGAGTGCTGTACAGCCTGCTAACTTTCCCAGAC 2 0 5' arm Tribolium_castaneum mirbase let-7 1e-36 tca-let-7 5e-39 -33.6 (((((...(((.(((((((((((((((((.........((....))...))))))))))))))))).)))...))))) (-33.60)