CAPN2 and acute lymphoblastic leukemia: Using quantitative real time PCR and the ΔΔCt method for results analysis we could demonstrate that the expression of μ-calpain gene (CAPN1, Fig 4A) was significantly higher the ALL blasts compared to the B cells from the control group (mean fold change ALL vs control = 2.3), while the expression of both m-calpain (CAPN2, Fig 4B) and calpastatin (CAST, Fig 4C) genes did not differ between the compared groups (fold changes 0.93 and 0.895 respectively).