title: Tandem repetition of the origin of DNA replication in defective polyoma virus DNA's.
mesh_terms: D001345:Autoradiography; D002874:Chromosome Mapping; D004261:DNA Replication; D004270:DNA, Circular / Q000032:analysis; D004279:DNA, Viral / Q000032:analysis*; D003851:Deoxyribonucleases / Q000378:metabolism; D004591:Electrophoresis, Polyacrylamide Gel; D004720:Endonucleases / Q000378:metabolism; D006193:Haemophilus influenzae / Q000201:enzymology; D009691:Nucleic Acid Denaturation; D011120:Polyomavirus / Q000032:analysis*
chemical_list: D004270:DNA, Circular; D004279:DNA, Viral; D003851:Deoxyribonucleases; D004720:Endonucleases