8843
This pro-IL-16 is subsequently processed to the mature cytokine of 13 kDa .
 ( protein: 13 kDa, None) , ( protein: pro-IL-16, 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: 13 kDa, None) , ( protein: pro-IL-16, None) 