tokens: Human erythroid 5-aminolevulinate synthase : promoter analysis and identification of an iron-responsive element in the mRNA .
folded_tokens: human erythroid 5-aminolevulinate synthase : promoter analysis and identification of an iron-responsive element in the mrna .
labels: B-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule O B-DNA_domain_or_region O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O B-RNA_domain_or_region O