3895
Two tyrosine phosphoproteins of 38 and 63 kD bind to the SH2 domain of Grb2 following Fc gamma RIIA stimulation of platelets .
 ( protein: SH2 domain, None) , ( protein: Grb2, None) , ( cell type: platelets, None) , ( protein: Fc gamma RIIA, None) , ( protein: tyrosine phosphoproteins, 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, None) , ( protein: Grb2, None) , ( cell type: platelets, None) , ( protein: Fc gamma RIIA, None) , ( protein: tyrosine phosphoproteins, None) 