title: Recovered src genes are polymorphic and contain host markers.
mesh_terms: D001355:Alpharetrovirus / Q000235:genetics*; D000818:Animals; D001358:Avian Sarcoma Viruses / Q000235:genetics / Q000378:metabolism*; D002642:Chick Embryo; D004247:DNA / Q000378:metabolism; D004591:Electrophoresis, Polyacrylamide Gel; D005814:Genes, Viral; D007163:Immunosorbent Techniques; D012367:RNA, Viral / Q000032:analysis; D011995:Recombination, Genetic; D014764:Viral Proteins / Q000032:analysis / Q000235:genetics*
chemical_list: D012367:RNA, Viral; D014764:Viral Proteins; D004247:DNA