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 ACTGCACTGCAAGCACTTCTTAC CAAAGTGCTTACAGTGCAGGTAG TTGGCCATGTCAAAGTGCTTACAGTGCAGGTAGCTTCTTGAGATCTACTGCACTGCAAGCACTTCTTACATTACCATG 3 2 3' arm Rattus_norvegicus mirbase mir-17 2e-23 rno-mir-17-2 5e-39 -32.4 .(((..((((..((((((((.((((((((.(((..((....)).))))))))))).))))))))...))))..))).. (-32.40)