However , it is not clear which , if any , of these kinases are responsible for initiating IL-4-induced tyrosine phosphorylation of intracellular substrates in vivo .
however , it is not clear which , if any , of these kinases are responsible for initiating il-4-induced tyrosine phosphorylation of intracellular substrates in vivo .
O O O O O O O O O O O O O O O O O O B-other_name B-amino_acid_monomer O O B-protein_family_or_group I-protein_family_or_group O O O