27887
Using a combination of 5 ` deletions and site - directed mutagenesis we show NPAS4 : ARNT transactivation to be co - dependent upon two conserved central midline elements ( CMEs ) within the Cry1 promoter .
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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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