14360
Indeed, this viral protein , which is essential for productive infection, has also been shown to display growth-stimulating properties and immunomodulatory activities.
 ( protein: viral protein, 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: viral protein, None) 