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 GTTTTTTTGCATATCCTGCA CAGAGTACGCAAAAAACAAT CACGGCAAAAGTTTTTTTGCATATCCTGCACAGTTTCAGTTCTCGCAGAGTACGCAAAAAACAATTTTGACGTGAG 6 0 5' arm Bombyx_mori mirbase mir-2778 1e-21 bmo-mir-2778a-1 7e-23 -23 ((((.(((((..((((((((.((..((((..((........)).))))..)).))))))))...))))).)))).. (-23.00)