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 CTAGTGAGGGACAGAACCAGGATTC GTCCATGGGCCTGGATCACTGG ACTAGTGAGGGACAGAACCAGGATTCAGACTCAGGTCCATGGGCCTGGATCACTGG 5 3 5' arm Homo_sapiens mirbase 100 ppy-mir-921 7e-19 -21.8 .(((((((....(((..((((((((........))))).)))..)))..))))))) (-21.80)