Cellular activation by thrombin led to a marked shift in the proportion of protein from the 27-kDa unphosphorylated form to the 29-kDa phosphoprotein species .
cellular activation by thrombin led to a marked shift in the proportion of protein from the 27-kda unphosphorylated form to the 29-kda phosphoprotein species .
O O O B-protein_molecule O O O O O O O O O O O O B-protein_molecule I-protein_molecule I-protein_molecule O O B-protein_molecule I-protein_molecule I-protein_molecule O