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 GGTTTTGAGAGGAATCCTTTT AAGGAAGCCTGCACGAAGTTTT GCAATGGTTTTGAGAGGAATCCTTTTACATATTTGTTGAAGTTTTCGCTCGAATTTGTGGTCGAATACTGTAGAAGGAAGCCTGCACGAAGTTTTG 5 1 5' arm Caenorhabditis_elegans mirbase 100 cel-mir-258-2 1e-49 -24.6 .......(((((.((((..((((((((((((((((.....(..(((....)))..).....)))))).))))))))))..))).).)))))..... (-24.60)