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 GGATATGATGACTGATTATCTGAAA CTAGATAGTCAAGTGCTGATCCAG TGCTGGATATGATGACTGATTATCTGAAATGCTGATGAAACCACTTCTAAAGTCCTCTAGATAGTCAAGTGCTGATCCAGCA 7 3 5' arm Gallus_gallus mirbase SNORD20 4e-37 100 -25.4 .(((((((......((((((((((((....(((...(((.....)))...)))....))))))))).)))....))))))). (-25.40)