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    Gene. 1990 Apr 30;89(1):117-22.

    Blunt-end and single-strand ligations by Escherichia coli ligase: influence on an in vitro amplification scheme.

    Barringer KJ, Orgel L, Wahl G, Gingeras TR.

    Source

    Salk Institute Biotechnology/Industrial Associates, Inc., San Diego, CA 92138.

    Abstract

    A ligase-based, in vitro DNA amplification system (LAR) has been described by Wu and Wallace [Genomics 4 (1989) 560-569]. This strategy is based on the ability of a DNA ligase to join the 5' phosphate of one DNA molecule to the 3' hydroxyl of a second during a nick-closing reaction. Escherichia coli DNA ligase has been used in place of the T4 DNA ligase in our study in order to limit template-independent ligation activities, which lower the sensitivity of this amplification procedure. The results of this study indicate that E. coli ligase also joins blunt-ended DNA molecules and some single-stranded oligodeoxyribonucleotides, in the absence of a complementary template, with an efficiency which is sensitive to both the concentrations of DNA substrate and enzyme.

    PMID:
    2197176
    [PubMed - indexed for MEDLINE]

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