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 TACTGCATCAGGAACTGATTGGA CAATCTGTTCCTCATGCATGGC CTGGGACTACTGCATCAGGAACTGATTGGATGGGATACAAATCAATCTGTTCCTCATGCATGGCTCAC 3 1 5' arm Branchiostoma_floridae mirbase mir-217 7e-32 dre-mir-217-1 0.0000002 -26.5 .((((.(((.(((((.((((((.((((((...(....)...)))))).)))))).)))))))))))). (-26.50)