title: Inserted retroviruses cause embryonic lethal mutation.
mesh_terms: D000483:Alleles; D000818:Animals; D004274:DNA, Recombinant; D004279:DNA, Viral / Q000235:genetics; D005260:Female; D005786:Gene Expression Regulation; D005804:Genes, Lethal; D051379:Mice; D008979:Moloney murine leukemia virus / Q000235:genetics*; D011247:Pregnancy
chemical_list: D004274:DNA, Recombinant; D004279:DNA, Viral