5028
These results indicate that, as already reported for the IL2Rbeta promoter , GA-binding protein is an essential component of gammac basal promoter activity .
 ( protein: GA-binding protein, None) , ( DNA: IL2Rbeta promoter, 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: GA-binding protein, None) , ( DNA: IL2Rbeta promoter, None) 