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Human erythroid 5-aminolevulinate synthase : promoter analysis and identification of an iron-responsive element in the mRNA .
 protein: Human erythroid 5-aminolevulinate synthase; DNA: promoter; RNA: mRNA; DNA: iron-responsive element
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: Human erythroid 5-aminolevulinate synthase; DNA: promoter; RNA: mRNA; DNA: iron-responsive element