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Uninduced or Sendai virus induced HeLa extracts were used to examine transcription in vitro using a series of IFN beta promoter deletions .
 DNA: IFN beta promoter deletions
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: IFN beta promoter deletions