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 TGGCTCAGTTCAGCAGGACAG GTATCTACTGGGCTGATAATCAGT CTCCCGTATCTACTGGGCTGATAATCAGTGGTTATAACTTCCCCTGGCTCAGTTCAGCAGGACAGGAG 3 3 3' arm Xenopus_laevis mirbase 100 xtr-mir-24b 2e-28 -24.4 ((((.((.(((.(((((((((...((((.((.........)).)))).))))))))).))))).)))) (-24.40)