The ZAP-70 mutant studied here could be phosphorylated on tyrosine when associated to the TCR zeta chain and was able to bind p56 ( lck ) .
the zap-70 mutant studied here could be phosphorylated on tyrosine when associated to the tcr zeta chain and was able to bind p56 ( lck ) .
O B-protein_molecule O O O O O O O B-amino_acid_monomer O O O O B-protein_subunit I-protein_subunit I-protein_subunit O O O O O B-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule O