- Expression of feline immunodeficiency virus gag and env precursor proteins in Spodoptera frugiperda cells and their use in immunodiagnosis. Verschoor, E.J., van Vliet, A.L., Egberink, H.F., Hesselink, W., Horzinek, M.C., de Ronde, A. J. Clin. Microbiol. (1993)









