In contrast to IL-2 and IFN-alpha , IL-12 induced strong tyrosine phosphorylation of STAT4 and variable weak phosphorylation of STAT3 .
in contrast to il-2 and ifn-alpha , il-12 induced strong tyrosine phosphorylation of stat4 and variable weak phosphorylation of stat3 .
O O O B-protein_molecule O B-protein_molecule O B-protein_molecule O O B-amino_acid_monomer O O B-protein_molecule O O O O O B-protein_molecule O