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 CACGGTTCAGCTGCATCAGG CGGATGCAGCCGTGCTCGT CACGGTTCAGCTGCATCAGGCTTACCAACGCCCGGATGCAGCCGTGCTCGT 4 2 5' arm Ciona_intestinalis mirbase 100 100 -22.4 .(((((.(.((((((((.(((........)))..)))))))).).)).))) (-22.40)