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 AGGAAAGTTTGGAAAGTGGTTTCCC GAAACCAAACCAAATTTTTCTTT CACTTTCCTGGAAACCAAACCAAATTTTTCTTTGACTAGAAAGTGTTTCTGTTGACCAGCTTTCCTAATGGCAAACAAACATAGGAAAGTTTGGAAAGTGGTTTCCCGGAAAGTG 3 2 3' arm Populus_trichocarpa pmrd 100 100 -45.3 ((((((((.((((((((..((((((((((((.((....((((((...((....))...))))))....((.....))..)).))))))))))))....)))))))).)))))))) (-45.30)