title: Selective ligation of DNA molecules following microinjection.
abstract: Avian retroviral DNA is rapidly ligated and transcribed following microinjection into chick cells. To analyze the fidelity of intranuclear ligations, DNA molecules with a variety of protruding ends or flush ends were co-injected into env-deficient Rous sarcoma virus-infected (RSV(-] cells. Two fragments were chosen which could complement the RSV(-) env deficiency upon ligation. This sensitive biological assay indicated that intracellular ligation between molecules with complementary protruding ends or flush ends was relatively efficient. Ligation was not observed with non-complementary termini. Furthermore, when multiple DNA molecules possessing a variety of protruding termini were introduced into the cells, complementary termini were selectively joined. Finally, when viral DNAs which expressed separate genetic markers were co-injected, almost 50% of the virus subsequently released were recombinants, indicating that ligations generally involved multiple molecules.
mesh_terms: D001358:Avian Sarcoma Viruses / Q000235:genetics*; D001483:Base Sequence; D002460:Cell Line; D002471:Cell Transformation, Neoplastic; D004262:DNA Restriction Enzymes; D004274:DNA, Recombinant / Q000378:metabolism; D004279:DNA, Viral / Q000235:genetics* / Q000302:isolation & purification; D005816:Genetic Complementation Test; D008845:Microinjections; D010957:Plasmids; D014158:Transcription, Genetic
chemical_list: D004274:DNA, Recombinant; D004279:DNA, Viral; D004262:DNA Restriction Enzymes