18088
Electrophoretic mobility shift assays demonstrated that hFXR - K210R and - K339R reduced the protein - DNA ( IR1 element at hBSEP promoter ) binding affinity by ~ 80 and ~ 90 % , respectively .
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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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