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When transfected into HepG2 cells , which lack C / EBP alpha , the mouse ob promoter was only weakly active .
 GENE: C / EBP alpha; GENE: mouse ob promoter
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: C / EBP alpha; GENE: mouse ob promoter