In contrast , Zap and other protein- tyrosine kinases were unable to reconstitute these signaling pathways when expressed at the same levels .
in contrast , zap and other protein- tyrosine kinases were unable to reconstitute these signaling pathways when expressed at the same levels .
O O O B-protein_molecule O O B-protein_family_or_group B-amino_acid_monomer O O O O O O B-other_name I-other_name O O O O O O O