4524
U1 lines overexpressing C/EBP activator NF-IL-6 produced more viral mRNA and virus particles following cellular activation than control lines , demonstrating that C/EBP proteins are limiting for virus transcription .
 ( protein: C/EBP activator, None) , ( protein: NF-IL-6, None) , ( cell line: control lines, None) , ( cell line: U1 lines, None) , ( RNA: viral mRNA, None) , ( protein: C/EBP proteins, 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: C/EBP activator, None) , ( protein: NF-IL-6, None) , ( cell line: control lines, None) , ( cell line: U1 lines, None) , ( RNA: viral mRNA, None) , ( protein: C/EBP proteins, None) 