Cytokines Polypeptides produced by a variety of cell types including T lymphocytes. Cytokine production is triggered by specific receptor binding and subsequent signal transduction pathways Cytokine repertoire is dependent on cell type triggered, receptors present on that cell type. Cytokines act on cells that possess receptors for them.Cytokines ◼ Polypeptides produced by a variety of cell types including T lymphocytes. ◼ Cytokine production is triggered by specific receptor binding and subsequent signal transduction pathways ◼ Cytokine repertoire is dependent on cell type triggered, receptors present on that cell type. ◼ Cytokines act on cells that possess receptors for them