1760
Site - directed mutagenesis , the LRG assay , and homology modeling highlighted the importance of each amino acid site in AHR1 sensitivity to 2 , 3 , 7 , 8 - tetrachlorodibenzo - p - dioxin and other DLCs .
 Chemical: amino acid; Chemical: 2 , 3 , 7 , 8 - tetrachlorodibenzo - p - dioxin
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: amino acid; Chemical: 2 , 3 , 7 , 8 - tetrachlorodibenzo - p - dioxin