9133
We used expression cloning to identify interleukin-6 ( IL-6 ) as one factor that suppressed growth of a pre-B-cell variant line , 1A9-M .
 ( cell line: pre-B-cell variant line, None) , ( protein: interleukin-6, None) , ( cell line: 1A9-M, None) , ( protein: IL-6, 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: pre-B-cell variant line, None) , ( protein: interleukin-6, None) , ( cell line: 1A9-M, None) , ( protein: IL-6, None) 