4201
To further analyze potential cross points between positively and negatively regulating signaling pathways in T cells , we tested the effects of activators of the adenylate cyclase or PKA on two parallel mitogen-activated protein kinase signaling pathways mediated by extracellular signal-regulated kinase ( ERK ) and c-Jun N-terminal kinase .
 ( protein: adenylate cyclase, None) , ( protein: c-Jun N-terminal kinase, None) , ( protein: PKA, None) , ( cell type: T cells, None) , ( protein: extracellular signal-regulated kinase, None) , ( protein: ERK, 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: adenylate cyclase, None) , ( protein: c-Jun N-terminal kinase, None) , ( protein: PKA, None) , ( cell type: T cells, None) , ( protein: extracellular signal-regulated kinase, None) , ( protein: ERK, None) 