5627
The E1B - 55kDa product has been shown to exhibit intrinsic transcriptional repression activity when localized to promoters , such as by fusion with the GAL4 DNA - binding domain , even in the absence of p53 .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
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