Two tyrosines ( Y113 and Y128 ) fall within an identical five amino-acid motif and are shown to be phosphorylated upon TCR ligation .
two tyrosines ( y113 and y128 ) fall within an identical five amino-acid motif and are shown to be phosphorylated upon tcr ligation .
O B-amino_acid_monomer O B-amino_acid_monomer O B-amino_acid_monomer O O O O O O O O O O O O O O O B-protein_family_or_group O O