title: Isolation of recombinant DNA clones carrying complete integrated proviruses of Moloney murine leukemia virus.
abstract: EcoRI DNA fragments from a Moloney murine leukemia virus (M-MuLV)-infected mouse fibroblast line (M-MuLV clone A9) were cloned in lambda phage Charon 4A cloning vector to derive clones containing integrated M-MuLV proviral DNA. A 10- to 16-megadalton class of EcoRI fragments was chosen for cloning, based on (i) its ability to induce XC-positive virus upon transfection of NIH/3T3 cells, and (ii) its content of a 0.8-megadalton viral KpnI fragment diagnostic for M-MuLV. Six recombinant DNA clones were isolated which contain a complete M-MuLV provirus, as judged by (i) restriction endonuclease mapping and (ii) the fact that all of the clones gave rise to XC-positive, NB-tropic virus upon DNA infection in NIH/3T3 cells. The sizes of the inserts were 12.0 (for three clones) or 12.5 megadaltons (for three clones). Restriction mapping indicated that these six clones represent five different M-MuLV proviral integrations into different cellular DNA sites.
mesh_terms: D010582:Bacteriophage lambda / Q000235:genetics; D002460:Cell Line; D002999:Clone Cells; D003001:Cloning, Molecular; D004262:DNA Restriction Enzymes; D004274:DNA, Recombinant; D004279:DNA, Viral / Q000235:genetics; D004926:Escherichia coli / Q000235:genetics; D005347:Fibroblasts; D008970:Molecular Weight; D008979:Moloney murine leukemia virus / Q000235:genetics*; D011995:Recombination, Genetic
chemical_list: D004274:DNA, Recombinant; D004279:DNA, Viral; D004262:DNA Restriction Enzymes