Figure 4

Double fluorescent gene excision using Cre/Lox System.
(a) Procedure of double fluorescent gene excision by Cre/Lox system. HEK293T cells were transfected with Cre-recombinase (b) or control plasmids (c) and then infected with fluorescent gene recombinant virus (MOI = 1). The images were taken at 36 hours after infection. (d) Plaque purification for double fluorescent genes excision virus. Cell plaques were indicated by arrows.