tokens: The putative factors that couple the signal transduction from surface receptors to the activation of cytokine synthesis in natural killer ( NK ) cells have not been elucidated .
folded_tokens: the putative factors that couple the signal transduction from surface receptors to the activation of cytokine synthesis in natural killer ( nk ) cells have not been elucidated .
labels: O O O O O O B-other_name I-other_name O O O O O O O B-protein_family_or_group O O B-cell_type I-cell_type I-cell_type I-cell_type I-cell_type I-cell_type O O O O O