7781
GrpL , a Grb2 -related adaptor protein , interacts with SLP-76 to regulate nuclear factor of activated T cell activation.
 ( protein: adaptor protein, None) , ( protein: Grb2, None) , ( cell type: activated T cell, None) , ( protein: GrpL, None) , ( protein: SLP-76, None) , ( protein: nuclear factor of activated T cell, 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: adaptor protein, None) , ( protein: Grb2, None) , ( cell type: activated T cell, None) , ( protein: GrpL, None) , ( protein: SLP-76, None) , ( protein: nuclear factor of activated T cell, None) 