Activation of helper T cells results in coordinate expression of a number of cytokines involved in differentiation , proliferation and activation of the haematopoietic system .
activation of helper t cells results in coordinate expression of a number of cytokines involved in differentiation , proliferation and activation of the haematopoietic system .
O O B-cell_type I-cell_type I-cell_type O O O O O O O O B-protein_family_or_group O O O O O O O O O B-body_part I-body_part O