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 TGATATTGGTCCGGCTCATC GTGATATTGGTCCGGCTCATCTTCTGTGCATAAGCATCTGAAGTTCTTCACTCATGAAGACGAGCCGAATCAATATCACT 3 0 3' arm Populus_trichocarpa micropc MIR171_2 6e-39 ptc-MIR479 4e-40 -38.1 (((((((((((.((((((..((((.((((....))))..)))).((((((....)))))).)))))).))))))))))). (-38.10)