<unk> , or<unk> , is an interleukin 6 class cytokine that affects cell growth by inhibiting differentiation. When<unk>  levels drop, the cells differentiate.
Leukemia inhibitory factor
Macrophage colony-stimulating factor
Colony-stimulating factor
Macrophage-activating factor
Major basic protein
Leukocyte-promoting factor
Hemopoietic growth factor
Interleukin