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 TAGCAGCACATCATGGTTTGTA CAGACCATTCTGAGCTGCCTCT CTTTGAGGTGATCTAGCAGCACATCATGGTTTGTAGAAACAAGGAGATACAGACCATTCTGAGCTGCCTCTTGA 5 0 5' arm Xenopus_laevis mirbase mir-15 5e-21 xtr-mir-15c 1e-36 -21.8 ...............(((((.((..((((((((((............))))))))))..)).)))))....... (-21.80)