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 CACATTCGGTCAACGTTC ATATTGATCGAATATGTA GAATATTGATCGAATATGTATGAAATATGATGGTTATATGTTTCATTCACATTCGGTCAACGTTC 3 0 3' arm Populus_trichocarpa micropc MIR1444 4e-30 ptc-MIR1444b 2e-31 -23.4 (((..((((((((((.((.((((((((((.......)))))))))).)).))))))))))..))) (-23.40)