5898
These data demonstrate that intracellular free calcium and the calcium -dependent protease , calpain play critical roles in monocytic differentiation .
 ( protein: calpain, None) , ( protein: calcium -dependent protease, 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: calpain, None) , ( protein: calcium -dependent protease, None) 