beta-galactosidase
UNASSIGNED: 2577 Background: GL-ONC1 is a genetically engineered vaccinia virus attenuated by insertion of the ruc-gfp (Renilla luciferase and Aequorea green fluorescent protein fusion gene), beta-galactosidase (lacZ) and beta-glucuronidase (gusA) reporter genes into the F14.5L, J2R (thymidine kinase) and A56R (hemagglutinin) loci, respectively.