tokens: An iron-responsive element ( IRE ) motif has been identified in the 5'-untranslated region of the human erythroid ALAS mRNA , but is not present in the housekeeping ALAS mRNA .
folded_tokens: an iron-responsive element ( ire ) motif has been identified in the 5'-untranslated region of the human erythroid alas mrna , but is not present in the housekeeping alas mrna .
labels: O B-DNA_domain_or_region I-DNA_domain_or_region O O O O O O O O O B-other_name I-other_name O O B-RNA_molecule I-RNA_molecule I-RNA_molecule I-RNA_molecule O O O O O O O B-RNA_family_or_group I-RNA_family_or_group I-RNA_family_or_group O