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 TCGCTTGGTGCAGGTCGGGA CCGCCTTGCATCAACTGA TCGCTTGGTGCAGGTCGGGAACTGATTCGGCGATTTGATTGCCAGATGGCTCGACATGACTGGTTGTTGTGGAAAAAGAAAAGGAAGGAAATAGGAAAAAAAAAACAAAGAATAGCGAATTGGATCCCGCCTTGCATCAACTGA 2 0 5' arm Populus_nigra micropc MIR168 2e-53 ptc-MIR168a 8e-55 -45.4 (((.((((((((((.(((((.(..(((((.(..((((...(((....)))....((..((.....))..))..................................)))).....))))))..).))))).)))))))))).))) (-45.40)