Hence , we have investigated whether Stat proteins are present in platelets and , if so , whether they become tyrosine phosphorylated in response to thrombopoietin .
hence , we have investigated whether stat proteins are present in platelets and , if so , whether they become tyrosine phosphorylated in response to thrombopoietin .
O O O O O O B-protein_family_or_group I-protein_family_or_group O O O B-cell_type O O O O O O O O B-amino_acid_monomer O O O O B-protein_molecule O