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 CAGCCAAGGATGATTTGCCGA GGCAGGTTTTCCTTGGCTA CAGCCAAGGATGATTTGCCGACGACTCAGTTTTTGCTTCCATATGGTAGGAGAGATGAAGAGGTTGGCAGGTTTTCCTTGGCTA 2 0 5' arm Populus_tremula pmrd MIR169_2 1e-31 ptc-MIR169c 5e-33 -42.3 .(((((((((.(((((((((((..((..((((((.((.((....)).)).))))))..))..))))))))))).))))))))). (-42.30)