Mimetics of the C-terminal CAAX tetrapeptide of Ras protein were designed replacing internal dipeptide AA with 4-amino-2-phenylbenzoic acid and cysteine (C) with 2-amino-4- thiazolyl-, 2-mercapto-4-thiazolyl-, 2-mercapto-4-imidazolyl-and 2-methylmercapto-4- thiazolyl-acetic or propionic acid. The compound in which C is replaced by 2-amino-4- thiazolylacetic acid inhibited FTase activity in the low nanomolar range and showed ...