1869
Thus , insulin / IGF - 1 signaling selectively engages AKT - 2 / DAF - 16 to promote DNA damage - induced germ cell apoptosis downstream of CEP - 1 through the Ras pathway .
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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