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 TCAATGTGTTGTGTTTGTCTC GGTCACACAAAAACATTCT TCAATGTGTTGTGTTTGTCTCTTTAGTATACTAAAAAATGAGGTCACACAAAAACATTCT 5 2 5' arm Medicago_truncatula pmrd 100 100 -12.2 ..(((((.((((((...(((((((((....)))))....))))..))))))..))))).. (-12.20)