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 CGTCGGTATATACCGATGGT CGTCGGTATATACCGACATA AAAATATTTCGTCGGTATATACCGATGGTATCTCCGACGAATTTATGCCGTCGGTATATACCGACATATTTT 1 0 5' arm Populus_trichocarpa pmrd 100 100 -34.82 ..........(((((((((((((((((((((.............)))))))))))))))))))))....... (-34.82)