12594
By confocal fluorescence microscopy , we observed a positive staining for NF-kappa B ( p65 subunit ) in the nuclei of PAEC exposed for 1 hr 30 min to human serum , which indicated NF-kappa B activation in this setting.
 ( protein: NF-kappa B, None) , ( protein: NF-kappa B, None) , ( protein: p65 subunit, None) , ( cell line: PAEC, 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: NF-kappa B, None) , ( protein: NF-kappa B, None) , ( protein: p65 subunit, None) , ( cell line: PAEC, None) 