2106
By contrast, many studies have reported that mitogen activation of T cells increases cAMP levels, implying a positive physiological role for cAMP in the activation process.
 ( cell type: T cells, None) , ( protein: mitogen, 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:
 ( cell type: T cells, None) , ( protein: mitogen, None) 