8261
Grf40 binds to the SH2 domain -containing leukocyte protein of 76 kD ( SLP-76 ) via its SH3 domain more tightly than Grb2 .
 ( protein: SH2 domain -containing leukocyte protein, None) , ( protein: Grf40, None) , ( protein: SH2 domain, None) , ( protein: SLP-76, None) , ( protein: Grb2, 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: SH2 domain -containing leukocyte protein, None) , ( protein: Grf40, None) , ( protein: SH2 domain, None) , ( protein: SLP-76, None) , ( protein: Grb2, None) 