2083
This allows us to characterize these two granule populations with regard to their content of membrane proteins , which become incorporated into the plasma membrane during exocytosis .
 ( protein: membrane proteins, 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: membrane proteins, None) 