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 TCATTGAGTGCAGCGTTGATG CCAGCGCTGCATTCAATCA TCATTGAGTGCAGCGTTGATGAAATCCTACATTTTGTGCTCTTAAACTGTTACCAACCCTTTATCCATGGCATCATTTCACCAGCGCTGCATTCAATCA 3 0 5' arm Populus_tremula_x_Populus_tremuloides micropc MIR397 5e-34 ptc-MIR397a 1e-37 -31.5 ..((((((((((((((((.((((((...(((.((((......)))).)))..(((............)))....)))))).)))))))))))))))).. (-31.50)