title: Improved M13 phage cloning vectors and host strains: nucleotide sequences of the M13mp18 and pUC19 vectors.
abstract: Three kinds of improvements have been introduced into the M13-based cloning systems. (1) New Escherichia coli host strains have been constructed for the E. coli bacteriophage M13 and the high-copy-number pUC-plasmid cloning vectors. Mutations introduced into these strains improve cloning of unmodified DNA and of repetitive sequences. A new suppressorless strain facilitates the cloning of selected recombinants. (2) The complete nucleotide sequences of the M13mp and pUC vectors have been compiled from a number of sources, including the sequencing of selected segments. The M13mp18 sequence is revised to include the G-to-T substitution in its gene II at position 6 125 bp (in M13) or 6967 bp in M13mp18. (3) M13 clones suitable for sequencing have been obtained by a new method of generating unidirectional progressive deletions from the polycloning site using exonucleases HI and VII.
authors.forename: C
authors.initials: C
authors.lastname: Yanisch-Perron
authors.forename: J
authors.initials: J
authors.lastname: Vieira
authors.forename: J
authors.initials: J
authors.lastname: Messing
mesh_terms: D001483:Base Sequence; D003001:Cloning, Molecular; D003090:Coliphages / Q000235:genetics*; D003227:Conjugation, Genetic; D004262:DNA Restriction Enzymes / Q000378:metabolism; D004277:DNA, Single-Stranded / Q000235:genetics; D004926:Escherichia coli / Q000378:metabolism; D005822:Genetic Vectors; D008745:Methylation; D009154:Mutation; D010957:Plasmids; D011995:Recombination, Genetic
chemical_list: D004277:DNA, Single-Stranded; D004262:DNA Restriction Enzymes