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 CGAAACTTGCGTGGAACAGG TTTTCATGTAAATTTCCAT CGAAACTTGCGTGGAACAGGCTGTTAGAATCCAGCCTTTTCATGTAAATTTCCAT 2 1 5' arm Ciona_intestinalis mirbase 100 cin-mir-4000a-1 2e-25 -22.1 .((((.((((((((((.((((((........)))))))))))))))).))))... (-22.10)