10376
Levels of both CYP1 - like genes were highest in digestive gland , whereas labial palps had the highest expression levels of the three CYP3 - like genes followed by digestive gland and outer margin of the mantle .
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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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