1868
In addition , the hypersensitivity of let - 60 / Ras gain - of - function mutants to damage - induced apoptosis was suppressed to wild - type levels by ablation of daf - 2 .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None