22487
Ligand activation leads to AhR nuclear translocation and binding to a xenobiotic response element ( XRE ) in association with the aryl receptor nuclear translocator ( Arnt ) to regulate gene expression .
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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:
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