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 ATCACATTGCCAGGGATTTCC GGATTCCTGGAGATGGGATTT CCGACAGCGGGGGATTCCTGGAGATGGGATTTTATTTTTGCAGCCAATAAATCACATTGCCAGGGATTTCCAACTGTC 5 0 3' arm Xenopus_laevis mirbase mir-23 0.00000007 xtr-mir-23a-1 2e-35 -33.8 ..(((((..((..((((((((..(((.(((((.....(((....))).))))).)))..))))))))..))..))))) (-33.80)