title: Expression of the murine mammary tumor virus in the milk of F1 hybrids of virus negative mouse strains.
mesh_terms: D000818:Animals; D005260:Female; D005786:Gene Expression Regulation; D006824:Hybridization, Genetic; D008324:Mammary Tumor Virus, Mouse / Q000032:analysis / Q000235:genetics*; D051379:Mice; D008815:Mice, Inbred Strains; D008892:Milk / Q000032:analysis*; D011247:Pregnancy; D011863:Radioimmunoassay; D014759:Viral Envelope Proteins; D014764:Viral Proteins / Q000032:analysis*
chemical_list: D014759:Viral Envelope Proteins; D014764:Viral Proteins