PTPN11 and B-cell chronic lymphocytic leukemia: In a similar trend, we found ARIH2 (also known as Triad1) differentially expressed in the CLL‐like MBL sample E. Briefly, ARIH2 acts as a tumor suppressor protein and is blocked by PTPN11, a protein that was also detected in the MBL proteome dataset but at very low expression levels (up to 20‐fold less than in the CLL samples).