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We previously reported a mouse model containing firefly luciferase ( fLUC ) knocked into the mdr1a genomic locus , allowing non - invasive bioimaging of intestinal mdr1a gene expression in live animals .
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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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