- A novel cationic lipid greatly enhances plasmid DNA delivery and expression in mouse lung. Wheeler, C.J., Felgner, P.L., Tsai, Y.J., Marshall, J., Sukhu, L., Doh, S.G., Hartikka, J., Nietupski, J., Manthorpe, M., Nichols, M., Plewe, M., Liang, X., Norman, J., Smith, A., Cheng, S.H. Proc. Natl. Acad. Sci. U.S.A. (1996)