FIG. 5.
Immunofluorescence analysis of mFIPV infected cells. LR7 cells were infected with mFIPV. For comparison, LR7 cells and FCWF cells were infected with MHV and FIPV, respectively. Infections were visualized at 6 h p.i. by immunofluorescence microscopy on permeabilized cells with the following antibodies: ascitic fluid G73 (αFIPV) from an FIPV-infected cat; 23F4.5 (αSf), an MAb against an epitope in the FIPV S ectodomain; and WA3.10 (αSm), an MAb against an epitope present in the MHV S ectodomain.