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 TGAGGTAGTAGGTTGTATAGTT CTATACAATCTACTGTCTTTCC TGCACTGTGGGATGAGGTAGTAGGTTGTATAGTTTTAGGGTCATACCCGCAACTGGGAGATAACTATACAATCTACTGTCTTTCCTAAAG 3 0 5' arm Gallus_gallus mirbase let-7 1e-28 mmu-let-7a-1 2e-36 -35.5 ....((.(((((.(((..((((((((((((((((.....(((...((((....)))).)))))))))))))))))))..)))))))).)) (-35.50)