Cross-linking CD19 on early human B lineage cells induces the formation of a CD19 /Vav/phosphatidylinositol-3 kinase complex , tyrosine phosphorylation of CD19 and Vav , and activation of the Ras pathway .
cross-linking cd19 on early human b lineage cells induces the formation of a cd19 /vav/phosphatidylinositol-3 kinase complex , tyrosine phosphorylation of cd19 and vav , and activation of the ras pathway .
O B-protein_molecule O O B-cell_type I-cell_type I-cell_type I-cell_type O O O O O B-protein_molecule O O O O B-amino_acid_monomer O O B-protein_molecule O B-protein_molecule O O O O O B-protein_molecule O O