13037
PDBu + iono induced equally high IL-2 levels in both groups and, when stimulated with plate-bound anti-CD3 monoclonal antibody ( mAb ), the IL-2 secretion by neonatal cells was undetectable and adult cells produced low amounts of IL-2 (mean 331 +/- 86 pg/ml).
 ( protein: mAb, None) , ( protein: IL-2, None) , ( cell type: adult cells, None) , ( protein: anti-CD3 monoclonal antibody, None) , ( protein: IL-2, None) , ( cell type: neonatal cells, None) , ( protein: IL-2, 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: mAb, None) , ( protein: IL-2, None) , ( cell type: adult cells, None) , ( protein: anti-CD3 monoclonal antibody, None) , ( protein: IL-2, None) , ( cell type: neonatal cells, None) , ( protein: IL-2, None) 