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 .
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 .
O B-protein_domain_or_region I-protein_domain_or_region O B-protein_molecule O O O O O B-protein_molecule O O O O B-protein_molecule I-protein_molecule O B-protein_molecule I-protein_molecule O O O B-amino_acid_monomer O O B-protein_molecule I-protein_molecule I-protein_molecule O O O