4827
The processing of p105 occurs constitutively in vivo but can be markedly enhanced by various cellular activation agents , although the underlying regulatory mechanism is not yet clear.
 ( protein: p105, 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: p105, None) 