title: Molecular cloning of unintegrated closed circular DNA of porcine retrovirus.
abstract: Viral DNA of unintegrated closed circular form was isolated from a swine kidney cell line (SKL) which was infected with a porcine retrovirus Tsukuba-1 (PRetV) produced from a swine malignant lymphoma-derived cell line. Shimozuma-1 and cloned using a lambda phage vector, Charon 21A. One of ten independent clones contained the 8.3 kb DNA fragment as an insert, which was thought to be a full length of viral DNA molecule carrying a long terminal repeat (LTR) sequence. We have analyzed this insert by mapping the recognition sites of some restriction endonucleases by Southern blot hybridization with appropriate probes.
mesh_terms: D000818:Animals; D002874:Chromosome Mapping; D003001:Cloning, Molecular; D004270:DNA, Circular / Q000032:analysis*; D004279:DNA, Viral / Q000032:analysis*; D009693:Nucleic Acid Hybridization; D012091:Repetitive Sequences, Nucleic Acid; D012190:Retroviridae / Q000235:genetics*; D013552:Swine
chemical_list: D004270:DNA, Circular; D004279:DNA, Viral