title: Studies on a defective variant of simian virus 40 that is substituted with DNA sequences derived from monkey DNA. I. Origin, properties, and purification.
mesh_terms: D000818:Animals; D001483:Base Sequence; D004279:DNA, Viral / Q000096:biosynthesis* / Q000302:isolation & purification; D003673:Defective Viruses / Q000378:metabolism*; D000882:Haplorhini; D009693:Nucleic Acid Hybridization; D013539:Simian virus 40 / Q000378:metabolism*
chemical_list: D004279:DNA, Viral