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 CGAGCCGAATCAATATCACT TGGTATTGATCCGGCTCATC GAAGCAGACATGGCGTGGTATTGATCCGGCTCATCTTCTGTATTTGCATCAGAAGTTCTTCGCTGAAGACGAGCCGAATCAATATCACTCTTGTACGCTTC 3 0 3' arm Populus_trichocarpa mirbase MIR171_2 1e-46 ptc-MIR171n 8e-48 -43.9 (((((..(((.((.(((((((((((.((((((..((((((.........)))))).(((((...))))).)))))).))))))))))).)))))..))))) (-43.90)