title: Visna virus DNA: discovery of a novel gapped structure.
mesh_terms: D000818:Animals; D002460:Cell Line; D004262:DNA Restriction Enzymes; D004270:DNA, Circular; D004279:DNA, Viral / Q000032:analysis* / Q000096:biosynthesis; D009690:Nucleic Acid Conformation; D009691:Nucleic Acid Denaturation; D012091:Repetitive Sequences, Nucleic Acid; D012756:Sheep; D014790:Visna-maedi virus / Q000032:analysis* / Q000254:growth & development
chemical_list: D004270:DNA, Circular; D004279:DNA, Viral; D004262:DNA Restriction Enzymes