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 TCTCCCCCAAAGGCATCCAA GGAAGCCTCTGAGGGAGATT AAGCTCTCAATCTCCCCCAAAGGCATCCAACATTCTCGTTATTTGAAGCAATTACTATAAACTGAGATATTGGAAGCCTCTGAGGGAGATTGGGAGCTT 3 0 5' arm Populus_trichocarpa pmrd MIR477 4e-50 ptc-MIR477a 5e-43 -49.3 ((((((((((((((((.((.((((.(((((...((((.((((...((....))...))))...))))..))))).)))).)).)))))))))))))))) (-49.30)