5899
Intracellular calcium appears to be most critical in the 1,25D3 -priming stage of differentiation, while calpain is essential in the TPA maturation response .
 ( protein: calpain, 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) 