In contrast , tyrosine-phosphorylated peptides containing Tyr374 or Tyr396 did not interact with Stat3 or block Stat3 activation .
in contrast , tyrosine-phosphorylated peptides containing tyr374 or tyr396 did not interact with stat3 or block stat3 activation .
O O O B-peptide I-peptide O B-amino_acid_monomer O B-amino_acid_monomer O O O O B-protein_molecule O O B-protein_molecule O O