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 TTAGATGACCATCAACGAAAA TTTGTTGATAGTCATCTAGTG CATGAATATATTTGTTGATAGTCATCTAGTGAACATTGAAAGTCATATTAGATGACCATCAACGAAAACATTCATG 2 0 3' arm Populus_trichocarpa pmrd 100 ptc-MIR827 8e-38 -28.3 (((((((.(.(((((((((.(((((((((((.((.......))..))))))))))).))))))))).).))))))) (-28.30)