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In the present study we demonstrate that mitogen activation of human peripheral T lymphocytes induces nuclear factors that form complexes with cyclic AMP response element-binding protein ( CREB ).
 ( cell type: T lymphocytes, None) , ( cell type: human peripheral T lymphocytes, None) , ( protein: CREB, None) , ( protein: mitogen, None) , ( protein: cyclic AMP response element-binding protein, 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 lymphocytes, None) , ( cell type: human peripheral T lymphocytes, None) , ( protein: CREB, None) , ( protein: mitogen, None) , ( protein: cyclic AMP response element-binding protein, None) 