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      Engineering hybrid genes without the use of restriction enzymes: gene splicing by overlap extension.

      Genes

      Amino Acid Sequence, Animals, DNA, Recombinant, DNA-Directed DNA Polymerase, Exons, Genes, MHC Class I, Genetic Engineering, methods, Introns, Mice, Molecular Sequence Data, Recombinant Fusion Proteins, biosynthesis, genetics, Recombinant Proteins, Taq Polymerase, Templates, Genetic

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          Abstract

          Gene splicing by overlap extension is a new approach for recombining DNA molecules at precise junctions irrespective of nucleotide sequences at the recombination site and without the use of restriction endonucleases or ligase. Fragments from the genes that are to be recombined are generated in separate polymerase chain reactions (PCRs). The primers are designed so that the ends of the products contain complementary sequences. When these PCR products are mixed, denatured, and reannealed, the strands having the matching sequences at their 3' ends overlap and act as primers for each other. Extension of this overlap by DNA polymerase produces a molecule in which the original sequences are 'spliced' together. This technique is used to construct a gene encoding a mosaic fusion protein comprised of parts of two different class-I major histocompatibility genes. This simple and widely applicable approach has significant advantages over standard recombinant DNA techniques.

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          2744488

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