title: Specific site of action for single-strand specific nuclease on the double-stranded circular DNA intermediates of an avian RNA tumor virus.
abstract: Circular viral DNA intermediates obtained from the quail tumor line, QT6, at 1 day after infection, were opened at one specific location by the single-strand specific nuclease, S1, of Aspergillus oryzae. This site was no longer accessible to the S1 nuclease when circles were first opened at another location with a restriction endonuclease.
mesh_terms: D001355:Alpharetrovirus; D002460:Cell Line; D004262:DNA Restriction Enzymes / Q000378:metabolism; D004270:DNA, Circular / Q000378:metabolism*; D004279:DNA, Viral / Q000378:metabolism*; D003851:Deoxyribonucleases / Q000378:metabolism*
chemical_list: D004270:DNA, Circular; D004279:DNA, Viral; D003851:Deoxyribonucleases; D004262:DNA Restriction Enzymes