10659
However, these plasmids produced transcriptional activity in HeLa cells only in conjunction with interferon gamma stimulation , a condition in which expression of both CIITA and class II major histocompatibility complex surface proteins are induced.
 ( protein: surface proteins, None) , ( cell line: HeLa cells, None) , ( protein: interferon gamma, None) , ( protein: class II major histocompatibility complex surface proteins, None) , ( DNA: plasmids, None) , ( protein: 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:
 ( protein: surface proteins, None) , ( cell line: HeLa cells, None) , ( protein: interferon gamma, None) , ( protein: class II major histocompatibility complex surface proteins, None) , ( DNA: plasmids, None) , ( protein: CIITA, None) 