The activation of Janus protein tyrosine kinases ( Jak ) and STAT ( signal transducer and activator of transcription ) proteins has recently been linked to the signal transduction mechanism of several cytokines .
the activation of janus protein tyrosine kinases ( jak ) and stat ( signal transducer and activator of transcription ) proteins has recently been linked to the signal transduction mechanism of several cytokines .
O O O B-protein_family_or_group I-protein_family_or_group B-amino_acid_monomer O O B-protein_family_or_group O O B-protein_family_or_group O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O O O O O O O O O O O O O B-protein_family_or_group O