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 AAGATTTTATAAAAAGGTG CAGGTATAAGAAGTTTT AAGATTTTATAAAAAGGTGTCTTGATGGACACAGGTATAAGAAGTTTT 7 2 5' arm Ciona_intestinalis mirbase 100 100 -11.5 ....(((((((.....((((((....))))))...)))))))...... (-11.50)