4569
125I- IL-13 did not bind to colon cancer cell lines , but unlabeled IL-13 competed for the binding of 125I-IL-4 .
 ( protein: IL-13, None) , ( protein: 125I- IL-13, None) , ( cell line: colon cancer cell lines, None) , ( protein: IL-13, None) , ( protein: 125I-IL-4, 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: IL-13, None) , ( protein: 125I- IL-13, None) , ( cell line: colon cancer cell lines, None) , ( protein: IL-13, None) , ( protein: 125I-IL-4, None) 