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 AACATTCAACGCTGTCGGTGAGT CATCGACCGTTGACTGTACC TCTCGATGAACATTCAACGCTGTCGGTGAGTTTTGTTCTTCCCGACCTTAAACCATCGACCGTTGACTGTACCTCGCCA 2 3 5' arm Petromyzon_marinus mirbase mir-181 0.0000000003 dre-mir-181a-2 0.00000000002 -23.9 ...(((.(.(((.((((((..(((((((.((((.(((......)))...))))))))))))))))).))).).)))... (-23.90)