6655
Possible roles of ERK in proliferation of transformed cells were also suggested.
 ( protein: ERK, None) , ( cell line: transformed 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: ERK, None) , ( cell line: transformed cells, None) 