6523
AP-1 but not NF-IL-6 DNA binding activity was also detected in C5a -stimulated PBMC ; however, its delayed expression (maximal at 4 hours) suggested a less important role in the rapid production of IL-8 .
 ( protein: AP-1, None) , ( protein: NF-IL-6, None) , ( protein: IL-8, None) , ( cell line: C5a -stimulated PBMC, None) , ( cell type: PBMC, 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: AP-1, None) , ( protein: NF-IL-6, None) , ( protein: IL-8, None) , ( cell line: C5a -stimulated PBMC, None) , ( cell type: PBMC, None) 