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Toward this end , we used two cultured colon cancer cell lines ; one ( RKO ) has a transcriptionally activated u - PAR gene , and the other ( GEO ) overexpresses the receptor only after phorbol ester treatment .
 GENE: u - PAR gene
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: u - PAR gene