Mutated ras oncogenes are frequently found in many human cancers, most notably cancers of the pancreas (90%), colon (50%) and lung (30%). 1, 2, 3, 4, 5 and 6 The p21 Ras oncogenic products are synthesized as cytosolic proteins, which undergo post-translational modifications before assuming their proliferative functions. The first and obligatory step is farnesylation. The enzyme farnesyltransferase (FT) catalyzes this reaction. 2, 3, 4, 5, 6, 7, 8 and 9 ...