10773
Consistent with theses results, nuclear extracts prepared from quiescent cells formed a specific complex with this element, whereas extracts prepared from cells treated with anti CD2 + anti CD28 failed to do so after cells entered a proliferative state .
 ( protein: CD2, None) , ( protein: anti CD2, None) , ( protein: CD28, None) , ( protein: anti CD28, 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: CD2, None) , ( protein: anti CD2, None) , ( protein: CD28, None) , ( protein: anti CD28, None) 