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 TTGCTTGCCGCAGGACCCAA GGATCCTGTTGGGGGCAGTA TAGTATTGGATCCTGTTGGGGGCAGTACCCAACGTTTTTTGATGGGTTTTGCTTGCCGCAGGACCCAAAGCTG 3 0 3' arm Populus_trichocarpa pmrd MIR474 0.001 100 -34.6 ((((.((((.((((((.(.((((((.(((((.((.....)).))))).)))))).).)))))).)))).)))) (-34.60)