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 CACATTCGGTCAATGTTC ATGTTGACCGAATATGGA GAATGTTGACCGAATATGGATGAAAAGTTGTTTTCCGTTTCCTTTCCTCCACATTCGGTCAATGTTC 1 0 3' arm Populus_x_canadensis micropc MIR1444 7e-29 ptc-MIR1444a 4e-30 -26.5 (((((((((((((((.((((.((((.(..(........)..))))).)))).))))))))))))))) (-26.50)