PepFect14 peptide vector for efficient gene delivery in cell cultures. by Veiman, K, Mäger, I, Ezzat, K, Margus, H, Lehto, T, Langel, K, Kurrikoff, K, Arukuusk, P, Suhorutšenko, J, Padari, K, Pooga, M, Lehto, T, Langel, Ü