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In transient cotransfection assays using Chang liver cells ( CCL 13 ) , pM1 DNA exerts a 6 - to 10 - fold trans - activating effect on the expression of the pSV2CAT reporter plasmid .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None