12959
Our results reveal that IKK inhibits TNF alpha - induced apoptosis through two distinct but cooperative mechanisms : activation of the survival factor NF - kappa B and inactivation of the proapoptotic BH3 - only BAD protein .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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