8773
In a variety of other cell types, which display a constitutive Elk-1 expression , HS 2 did not exist, suggesting that inducibility of elk-1 expression is associated with the presence of HS 2.
 ( DNA: elk-1, None) , ( protein: Elk-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:
 ( DNA: elk-1, None) , ( protein: Elk-1, None) 