13848
In functional studies, interferon-gamma -stimulated PIEC clones transfected with this mutated CIITA construct failed to stimulate purified human CD4+ T lymphocytes .
 ( cell type: human CD4+ T lymphocytes, None) , ( protein: interferon-gamma, None) , ( cell line: interferon-gamma -stimulated PIEC clones, None) , ( protein: CIITA, None) , ( cell line: PIEC clones, None) , ( protein: mutated CIITA, 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 type: human CD4+ T lymphocytes, None) , ( protein: interferon-gamma, None) , ( cell line: interferon-gamma -stimulated PIEC clones, None) , ( protein: CIITA, None) , ( cell line: PIEC clones, None) , ( protein: mutated CIITA, None) 