These phosphotyrosines serve as docking sites for latent , cytoplasmic transcription factors known as signal transducers and activators of transcription ( Stat ) proteins .
these phosphotyrosines serve as docking sites for latent , cytoplasmic transcription factors known as signal transducers and activators of transcription ( stat ) proteins .
O B-amino_acid_monomer O O B-protein_domain_or_region I-protein_domain_or_region O O O B-protein_family_or_group B-protein_family_or_group I-protein_family_or_group O 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 I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O