ZAP70 and B-cell chronic lymphocytic leukemia: Among others, these proteins included oncogenic proteins, such as VAV1 (proto‐oncogene), BCL2 (apoptosis regulator, phosphorylated on Thr464), ZAP70 (tyrosine protein kinase used as CLL prognostic marker), CD53, CD79b (BCR‐associated protein), and CD20.