English: A cell monolayer showing two plaques caused by infection with an oncolytic Vaccinia virus. The color is produced by expression of the E. coliLacZmarker gene, resulting in Beta-galactosidase enzyme activity on the X-Gal substrate.
{{Information |Description ={{en|1=A cell monolayer showing two plaques caused by infection with an oncolytic Vaccinia virus. The color is produced by expression of the E. coliLacZmarker gene, resulting i...