title: Origin of retroviruses from cellular moveable genetic elements.
mesh_terms: D001483:Base Sequence; D005075:Biological Evolution; D002471:Cell Transformation, Neoplastic; D002472:Cell Transformation, Viral; D004247:DNA; D004251:DNA Transposable Elements; D004279:DNA, Viral; D004259:DNA-Directed DNA Polymerase / Q000235:genetics; D005814:Genes, Viral; D011995:Recombination, Genetic; D012091:Repetitive Sequences, Nucleic Acid; D012190:Retroviridae / Q000235:genetics*
chemical_list: D004251:DNA Transposable Elements; D004279:DNA, Viral; D004247:DNA; D004259:DNA-Directed DNA Polymerase