<unk>  <unk>  is a protein belonging to the cytokine family. It is known to play an important role in the maturation of T cell populations through activation of antigen-presenting cells.<unk>  is produced mainly by non-hematopoietic cells such as fibroblasts, epithelial cells and different types of<unk>  or<unk> -like cells. These cells are located in regions where<unk>  activity is required.
Thymic stromal lymphopoietin
Macrophage colony-stimulating factor
Leukemia inhibitory factor
Hemopoietic growth factor
Granulocyte-macrophage colony-stimulating factor
Major basic protein
Granulocyte colony-stimulating factor
Macrophage-activating factor