8258
Grf40 , A novel Grb2 family member , is involved in T cell signaling through interaction with SLP-76 and LAT .
 ( protein: LAT, None) , ( protein: Grf40, None) , ( protein: Grb2 family member, None) , ( protein: SLP-76, 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: LAT, None) , ( protein: Grf40, None) , ( protein: Grb2 family member, None) , ( protein: SLP-76, None) 