FGTI-2734 mesylate, a RAS C-terminal mimetic compound with dual farnesyl transferase (FT) and geranylgeranyl transferase-1 (GGT) inhibitory activities (IC50s of 250 nM and 520 nM for FT and GGT, respectively), mitigates KRAS resistance by preventing its membrane localization, effectively impeding mutant KRAS patient-derived pancreatic tumors.