Abstract
Here we describe a robust method, termed QuikChange shuffling, for efficient site-directed mutagenesis and random recombination of homologous genes. The homologous genes are fragmented, and the random fragments are reassembled in a self-priming polymerase reaction to obtain chimeric genes. The product is then mixed with linearized vector and two pairs of complementary mutagenic primers, followed by assembly of the chimeric genes and linearized vector through QuikChange-like amplification to introduce recombinant plasmids with a site-directed mutation. The method, which can yield 100% chimeric genes after library construction, is more convenient and efficient than current DNA shuffling methods.
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