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 CTCCTCAAAGGGTTGTGAAATG TATCACAGCCATTTTGATGAGTT TACGTAACTCCTCAAAGGGTTGTGAAATGTCGACTATTATCTACTCATATCACAGCCATTTTGATGAGTTTCGTG 2 1 5' arm Drosophila_melanogaster mirbase mir-2 2e-32 der-mir-13a 3e-37 -27.2 ((((.(((((.((((((((((((((.(((..((......))....))).)))))))).)))))).))))).)))) (-27.20)