( 2-Amino-3'-methoxyphenyl ) oxanaphthalen-4-one ( PD 98059 ) , an inhibitor of extracellular signal-regulated protein kinase ( ERK ) activation , blocked the serine phosphorylation of STAT3 induced by chemotactic factors or PMA .
( 2-amino-3'-methoxyphenyl ) oxanaphthalen-4-one ( pd 98059 ) , an inhibitor of extracellular signal-regulated protein kinase ( erk ) activation , blocked the serine phosphorylation of stat3 induced by chemotactic factors or pma .
B-other_organic_compound I-other_organic_compound I-other_organic_compound I-other_organic_compound O B-other_organic_compound I-other_organic_compound O O O O O O B-protein_molecule I-protein_molecule I-protein_molecule O B-protein_molecule O O O O O B-amino_acid_monomer O O B-protein_molecule O O B-protein_family_or_group I-protein_family_or_group O B-other_organic_compound O