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Directionally cloned random cDNA expression vector libraries, compositions and methods of use

  • US 6,808,906 B2
  • Filed: 05/08/2002
  • Issued: 10/26/2004
  • Est. Priority Date: 05/08/2002
  • Status: Expired due to Term
First Claim
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1. A method for producing a vector, comprising:

  • a) contacting an mRNA with a random primer under conditions suitable for production of a double-stranded cDNA, said random primer having at its 5′

    terminus a partial sequence of a restriction site for an infrequently cutting restriction endonuclease;

    b) ligating double-stranded adaptors to the ends of said double-stranded cDNA to produce an adaptor-modified cDNA having a complete restriction site sequence for said endonuclease at one end of said double-stranded cDNA;

    c) contacting said adaptor-modified cDNA with said restriction endonuclease to produce digested cDNA; and

    d) ligating the digested cDNA into a vector.

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