NCIt definition : A likely membrane attachment device, farnesylation involves enzymatic covalent addition
of farnesyl group(s) (three isoprene units) to polypeptide chains that contain the
carboxyl terminal motif CAAX. The addition involves cleavage and addition to the free
thiol group of cysteine moiety, and methylation of the free carboxylate group on the
protein's carboxyl terminus.;