title: Pock formation by vaccinia virus deoxyribonucleic acid after passage through Escherichia coli spheroplasts.
mesh_terms: D000818:Animals; D002642:Chick Embryo; D003470:Culture Media; D003588:Cytopathogenic Effect, Viral; D004279:DNA, Viral; D004926:Escherichia coli; D011523:Protoplasts; D014616:Vaccinia virus
chemical_list: D003470:Culture Media; D004279:DNA, Viral