8554
In the current study , the roles of two putative cis - acting elements within the - 73 to + 44 region in basal exon 2 promoter activity were evaluated using mutagenesis and nuclear protein - DNA binding assays .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
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