STAT5B and B-cell chronic lymphocytic leukemia: ChIPs in granulocytes from a CLL patient with high DPF3 mRNA levels (83.51) and a healthy individual with low DPF3 (3.85) mRNA levels showed that STAT5 was bound to the promoter of DPF3 in both samples; however the enrichment was significantly higher in the CLL patient (Figure 5A).