title: Lack of requirement of murine leukemia virus for early steps in infection of mouse embryo cells by murine sarcoma virus.
mesh_terms: D000818:Animals; D002460:Cell Line; D046508:Culture Techniques; D006378:Helper Viruses; D007668:Kidney; D009052:Leukemia Virus, Murine / Q000472:pathogenicity; D051379:Mice; D008815:Mice, Inbred Strains; D008979:Moloney murine leukemia virus / Q000187:drug effects / Q000254:growth & development* / Q000472:pathogenicity; D051381:Rats; D014357:Trypsin / Q000494:pharmacology; D014776:Virus Cultivation; D014779:Virus Replication
chemical_list: D014357:Trypsin