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 GTCACTTCCAGACCAGCGAG CGTCTTGCGATGGAGGTGATTA GGCAGACTTCTCGTCTTGCGATGGAGGTGATTAATCTCAAGTTCGTCGATACCTCATCGAAGGGGGGACATGGTCACTTCCAGACCAGCGAGGAAAAGGCC 3 2 3' arm Arabidopsis_thaliana pmrd 100 100 -37.4 (((....(((((((..((...((((((((((((.((((...((((..((....))..))))...))))..))))))))))))...)))))))))....))) (-37.40)