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 TGGAGAAGCAGGGCACGTGCA CACGTGCTCCCCTTCTCCAAC TAGCTCTTGCTGGAGAAGCAGGGCACGTGCAAGCTCTCTCCTCAAGCTTTCCTTGCACGTGCTCCCCTTCTCCAACATGGGT 2 0 5' arm Populus_trichocarpa pmrd MIR164 4e-40 ptc-MIR164c 2e-41 -40.4 ..((((.((.((((((((..(((((((((((((....((.....)).....)))))))))))))..)))))))).)).)))) (-40.40)