title: Filamentous coliphage M13 as a cloning vehicle: insertion of a HindII fragment of the lac regulatory region in M13 replicative form in vitro.
abstract: A HindII restriction fragment comprising the Escherichia coli lac regulatory region and the genetic information for the alpha peptide of beta-galactosidase (beta-D-galactosidegalactohydrolase, EC. 3.2.1.23) has been inserted into 1 of the 10 Bsu I cleavage sites of M13 by blunt end ligation. A stable hybrid phage was isolated and identified by its ability to complement the lac alpha function. Further characterization of the hybrid phage includes retransformation studies, agarose gel electrophoresis, DNA-DNA hybridization, and heteroduplex mapping. The insertion point has been localized at 0.083 map unit on thewild-type circular map-i.e., within the intergenic region. The results prove that part of the intergenic region is nonessential and that the phage can be used as a cloning vehicle.
mesh_terms: D003090:Coliphages / Q000378:metabolism; D004262:DNA Restriction Enzymes; D004274:DNA, Recombinant / Q000378:metabolism*; D004277:DNA, Single-Stranded / Q000378:metabolism*; D004279:DNA, Viral / Q000378:metabolism*; D004926:Escherichia coli / Q000378:metabolism; D005814:Genes, Viral; D007786:Lactose Factors; D009693:Nucleic Acid Hybridization; D010957:Plasmids
chemical_list: D004274:DNA, Recombinant; D004277:DNA, Single-Stranded; D004279:DNA, Viral; D004262:DNA Restriction Enzymes