HSPA9 and leukemia: Pro-proliferative function of mortalin (mot-2) has been demonstrated by several studies including its overexpression resulting in (i) lifespan extension of normal human fibroblasts [8,9], (ii) growth advantage and attenuation of differentiation of HL-60 promyelocytic leukaemia cells [10], (iii) malignant transformation of mouse and human immortal cells [11,12] and (iv) lifespan extension of worms [13].