Definitions of T Cell Growth Factor P40

  1. Factor that is thought to be a regulator of hematopoiesis. It has been shown to enhance the growth of human mast cells and megakaryoblastic leukemic cells as well as murine helper t- cell clones. IL- 9 is a glycoprotein with a molecular weight of 32- 39 that is derived from T- cells, and maps to human chromosome 5.