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 CATGACTCCTCTGATGCCAACTA GTTGGCATCCAGGGAGCCAGGCA CTGCATGACTCCTCTGATGCCAACTATGAAGAGTCAAGACCACTCGACAAATTTCTTAGTTGGCATCCAGGGAGCCAGGCAG 4 0 5' arm Populus_trichocarpa pmrd mir-160 0.000000004 ptc-MIR160g 2e-41 -37.9 ((((.((.(((((..(((((((((((.((((.(((.((....)).)))...)))).)))))))))))..))))).)).)))) (-37.90)