PTK2B and B-cell chronic lymphocytic leukemia: While FAK showed significantly higher expression level in PB‐derived healthy B‐cell samples (p = 0.0079) compared to CLL (Figure 1A), PYK2 showed the opposite trend, with significantly higher expression levels in CLL PB‐derived cases (p = 0.0175) compared to healthy B cells (Figure 1B).