GAPDH and B-cell chronic lymphocytic leukemia: The average expression level of TRIP13 in CLL CD19+ B cells was 0.048 (2−ΔCt (TRIP13-GAPDH)) while the TRIP13 level in healthy CD19+ B cells was 0.012 (2−ΔCt (TRIP13-GAPDH)) (Figure 1A).