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To determine the E1A domain (s) responsible for these properties several cell lines were created by transforming baby rat kidney (BRK) cells with a set of plasmids expressing different Ad2/Ad12 hybrid E1A gene products .
 ( cell line: baby rat kidney (BRK) cells, None) , ( DNA: E1A domain, None) , ( protein: Ad2/Ad12 hybrid E1A gene products, None) , ( DNA: plasmids, None) , ( cell line: cell lines, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( cell line: baby rat kidney (BRK) cells, None) , ( DNA: E1A domain, None) , ( protein: Ad2/Ad12 hybrid E1A gene products, None) , ( DNA: plasmids, None) , ( cell line: cell lines, None) 