SOD1 and lung cancer: (E) Immunoblot of WT and PPM1D-mutant OCI-AML2 after transduction with the empty vector (EV) control and after SOD1 deletion (left) or after treatment with SOD1 inhibitors for 16 hr (right, ATN-224 12.5 μM, lung cancer screen-1 [LCS-1] 1.25 μM).