title: An electron microscopic method for studying and mapping the region of weak sequence homology between simian virus 40 and polyoma DNAs.
mesh_terms: D001483:Base Sequence; D002874:Chromosome Mapping; D004262:DNA Restriction Enzymes; D004279:DNA, Viral / Q000032:analysis* / Q000302:isolation & purification; D005559:Formamides / Q000494:pharmacology; D006358:Hot Temperature; D008854:Microscopy, Electron / Q000379:methods; D008970:Molecular Weight; D009691:Nucleic Acid Denaturation; D009693:Nucleic Acid Hybridization; D011118:Polynucleotide Ligases; D011120:Polyomavirus / Q000032:analysis*; D013539:Simian virus 40 / Q000032:analysis*
chemical_list: D004279:DNA, Viral; D005559:Formamides; D004262:DNA Restriction Enzymes; D011118:Polynucleotide Ligases