18703
Mouse liver tumors that harbor activating mutations in Ctnnb1 , encoding beta - catenin , express high levels of various cytochromes P450 ( CYP ) , including CYP2E1 and CYP1A2 .
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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