14902
The presence of c-fos had a negative influence on GR function and correlated with the cell-specific synergistic or antagonistic activity of Jun with respect to GR ; high basal expression of c-fos as well as AP-1 DNA binding and transcriptional activity were observed in HeLa cells , but not in T cells .
 ( protein: GR, None) , ( protein: GR, None) , ( protein: c-fos, None) , ( protein: c-fos, None) , ( cell line: HeLa cells, None) , ( cell type: T cells, None) , ( protein: Jun, None) , ( protein: AP-1, 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: GR, None) , ( protein: GR, None) , ( protein: c-fos, None) , ( protein: c-fos, None) , ( cell line: HeLa cells, None) , ( cell type: T cells, None) , ( protein: Jun, None) , ( protein: AP-1, None) 