20706
Gene expression was evaluated by real - time PCR ( RT - PCR ) ; NIS promoter activity was determined with a luciferase reporter assay ; and protein expression was assessed through immunofluorescence .
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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:
 None