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It was found that treatment with IFN-gamma induces changes in the occupancy of the DRA gene regulatory sequences by nuclear factors .
 nuclear factors, IFN-gamma, DRA gene regulatory sequences
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 nuclear factors, IFN-gamma, DRA gene regulatory sequences