title: Characterization of cloned evolutionary variants of simian virus 40.
mesh_terms: D002874:Chromosome Mapping; D004261:DNA Replication; D004262:DNA Restriction Enzymes; D004279:DNA, Viral / Q000032:analysis* / Q000096:biosynthesis; D003673:Defective Viruses / Q000032:analysis*; D005816:Genetic Complementation Test; D006378:Helper Viruses / Q000378:metabolism; D011995:Recombination, Genetic; D013539:Simian virus 40 / Q000032:analysis*
chemical_list: D004279:DNA, Viral; D004262:DNA Restriction Enzymes