Map of FIV vectors. (A) eGFP-expressing transfer vector pHSVtkiG. (B) eGFP-expressing transfer vector pGINSIN. hCMVp, CMV promoter; RRE, Rev-response element; neo, neomycin resistance; WPRE, woodchuck hepatitis posttranscriptional regulatory element; cPPT, central polypurine tract; CTS, central termination sequence.