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Only stably transfected target cells exhibited cytolytic susceptibility, despite expression of equivalent levels of E1A proteins in Ad-infected targets .
 ( protein: E1A proteins, None) , ( cell line: Ad-infected targets, None) , ( cell line: transfected target cells, 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:
 ( protein: E1A proteins, None) , ( cell line: Ad-infected targets, None) , ( cell line: transfected target cells, None) 