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 TGTTCTCAGGTCGCCCCTG GGAGCGACCTGAAATCACA CAGGAGCGACCTGAAATCACATGTGGGCTGCTCGGCAACATTTGTTCTCAGGTCGCCCCTG 4 0 3' arm Populus_tremula_x_Populus_alba micropc MIR398 1e-27 ptc-MIR398c 0.00000000004 -31.2 ((((.(((((((((...((.((((..(((....))).)))).))...))))))))).)))) (-31.20)