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 TTCCCTTTGTCATCCTATGCCT GCAAGGACAGCAAAGGGGACC TGGAGGGATTCCCTTTGTCATCCTATGCCTGTAATCGCCTCTAAGGCAAGGACAGCAAAGGGGACCCCTGT 2 1 5' arm Petromyzon_marinus mirbase mir-204 0.00001 xtr-mir-204-1 0.000003 -34.42 ...((((.((((((((((..((((.(((((.............)))))))))..)))))))))).)))).. (-34.42)