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 TGACTCTCTTAAGGAAGCCA TTTTTCTTAGGTCAGAGTCA TGACTCTCTTAAGGAAGCCAGGACTTTTTCTTAGGTCAGAGTCA 4 2 5' arm Ciona_intestinalis mirbase 100 100 -15.5 .((((((((((((((((........))))))))))..)))))). (-15.50)