- Protein geranylgeranyltransferase of Saccharomyces cerevisiae is specific for Cys-Xaa-Xaa-Leu motif proteins and requires the CDC43 gene product but not the DPR1 gene product. Finegold, A.A., Johnson, D.I., Farnsworth, C.C., Gelb, M.H., Judd, S.R., Glomset, J.A., Tamanoi, F. Proc. Natl. Acad. Sci. U.S.A. (1991)