Notably, the GSTO1*A140 proteoform showed a significant AD‐related increase in abundance in the frontal lobe (fold‐change [FC] = 1.86, p = 0.017; Figure 3A), as well as in platelets (FC = 1.40, p = 0.016; Figure 3A). This evidence concerns the gene GSTO1 and Alzheimer disease.