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 ATTCTGTATGGAGTTGAACT CTCAACTTATACAGAACTG CAGCTCAACTTATACAGAACTGAGACCACAATTCTGTATGGAGTTGAACT 2 1 3' arm Ciona_intestinalis mirbase 100 cin-mir-4081 2e-22 -17.2 .((.(((((((((((((((.((......)).)))))))).))))))).)) (-17.20)