3898
The SH3 domains of Grb2 form a stable complex with SOS1 and two proteins of 75 kD and 120 kD , which undergo tyrosine phosphorylation in Fc gamma RIIA stimulated cells .
 ( protein: Grb2, None) , ( protein: 120 kD, None) , ( protein: SOS1, None) , ( protein: 75 kD, None) , ( protein: Fc gamma RIIA, None) , ( cell line: Fc gamma RIIA stimulated cells, None) , ( protein: SH3 domains, 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: Grb2, None) , ( protein: 120 kD, None) , ( protein: SOS1, None) , ( protein: 75 kD, None) , ( protein: Fc gamma RIIA, None) , ( cell line: Fc gamma RIIA stimulated cells, None) , ( protein: SH3 domains, None) 