1104
Selected transfected clones produced low levels of IFN A ( IFNA ) constitutively, and their abilities to express interleukin-2 and interleukin-2 receptor upon stimulation with phytohemagglutinin and phorbol myristate acetate were retained.
 ( protein: interleukin-2, None) , ( protein: interleukin-2, None) , ( protein: IFN A, None) , ( protein: interleukin-2 receptor, None) , ( protein: IFNA, None) , ( cell line: transfected clones, None) , ( protein: phytohemagglutinin, 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: interleukin-2, None) , ( protein: interleukin-2, None) , ( protein: IFN A, None) , ( protein: interleukin-2 receptor, None) , ( protein: IFNA, None) , ( cell line: transfected clones, None) , ( protein: phytohemagglutinin, None) 