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 GGAGGTAGTTCGTTGTGTGGT CATACAACCGACTGGCTTTCCCA TGGGAGGTAGTTCGTTGTGTGGTTTGCTTGTCAAAATGATTAAAGACCATACAACCGACTGGCTTTCCCATT 2 2 5' arm Schistosoma_mansoni mirbase 100 sja-let-7 9e-19 -31.4 ((((((.(((((.((((((((((((....(((.....)))...)))))))))))).))))).)..))))).. (-31.40)