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Using reporter gene constructs driven by the CD4 promoter , we report that HHV - 6 can efficiently transactivate such genetic elements .
 GENE: CD4 promoter
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: CD4 promoter