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We have tested several subregions of the DR enhancer B domain , either alone or in combination, for their capacity to transmit the R-activating signal to the rabbit beta-globin promoter .
 DNA: rabbit beta-globin promoter; DNA: B domain; DNA: DR enhancer
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:
 DNA: rabbit beta-globin promoter; DNA: B domain; DNA: DR enhancer