Photographs of monolayers of cells transfected with synthetic RNA from pBACDV1flcNS1* and pBACDV1flc, and then grown at 30°C or 37C. BHK cells were electroporated with transcribed RNA from pBACDV1flcNS1* and pBACDV1flc, diluted with naïve BHK cells, incubated for 5 days at indicated temperature, then fixed and stained with MAb D2-7E11. In all cases, the same dilution (10-fold) of electroporated cells is shown.