title: Did retroviruses evolve from transposable elements?
mesh_terms: D001483:Base Sequence; D005075:Biological Evolution; D004251:DNA Transposable Elements; D004279:DNA, Viral / Q000235:genetics; D005814:Genes, Viral; D012190:Retroviridae / Q000235:genetics*
chemical_list: D004251:DNA Transposable Elements; D004279:DNA, Viral