B2M and acute lymphoblastic leukemia: The expression level of BCL11B mRNA in PBMCs from patients with T-ALL (1821.81 ± 1896.58 copies/105 β2M copies) was significantly higher than that from healthy controls (259.71 ± 182.72 copies/105 β2M copies; t = 2.46; P = 0.039; Figure 1).