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 TGAAACTTGCAGGAACGGGC CTTTTTCAACAGGTTTC TGAAACTTGCAGGAACGGGCCTTGTCCCAACAAGTCTTTTTCAACAGGTTTC 4 0 5' arm Ciona_intestinalis mirbase 100 cin-mir-4000b-2 1e-23 -16.3 .((((((((..((((.((((.((((....)))))))).))))..)))))))) (-16.30)