5622
It has been shown previously that the 55 - kDa polypeptide abrogates p53 - mediated transactivation and that mutants defective in p53 binding are unable to cooperate with E1A in transformation .
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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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