the development of semisolid culture methods supporting the clonal proliferation and maturation of granulocytes and macrophages led to the discovery of a group of specific glycoproteins , the colony-stimulating factors ( csfs ) , whose function it is to control the proliferation and functional activity of granulocytes , macrophages and associated blood cells .
C0017968
glycoproteins
C0009392
colony-stimulating factors