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 TGTGTTCTCAGGTCGCCCCT GAGCGACCTGAAATCACATG AGGAGCGACCTGAAATCACATGTGGGCTGCACCCTCCTGGGTTATCTTGGGCAACATGTGTTCTCAGGTCGCCCCT 4 0 3' arm Populus_nigra micropc MIR398 0.0000000003 ptc-MIR398c 2e-35 -38.4 (((.(((((((((...((((((((((.....))).((..((....))..))..)))))))...))))))))).))) (-38.40)