Use of exo-sample nucleotides in gene cloning
First Claim
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1. A method for incorporating a double-stranded linear desired nucleic acid molecule having a first and a second strand into a double-stranded vector, comprising the steps of:
- (A) forming a modified desired nucleic acid molecule characterized in possessing a first region of pre-selected sequence at at least one terminus of a first strand, said sequence being of a length of from about 10 to about 20 nucleotides, and being composed of at least about one third dU residues;
(B) treating said first region of pre-selected sequence under conditions sufficient to result in the removal of the uracil base of at least one of said dU residues, to thereby form a protruding terminus capable of hydrogen bonding to a complementary sequence on at least one strand of said modified desired molecule;
(C) incubating said treated modified molecule of step (B) in the presence of a modified vector having at least one protruding single-stranded terminus, and being capable of hydrogen bonding to at least one of said protruding terminus of said modified desired DNA molecule, to thereby incorporate said double-stranded linear desired nucleic acid molecule into said double-stranded vector.
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Abstract
The present invention provides improved methods for manipulating recombinant DNA in gene cloning and expression. More specifically, the invention provides methods capable of altering a nucleic acid sequence present at the termini of a target sequence.
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Citations
14 Claims
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1. A method for incorporating a double-stranded linear desired nucleic acid molecule having a first and a second strand into a double-stranded vector, comprising the steps of:
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(A) forming a modified desired nucleic acid molecule characterized in possessing a first region of pre-selected sequence at at least one terminus of a first strand, said sequence being of a length of from about 10 to about 20 nucleotides, and being composed of at least about one third dU residues; (B) treating said first region of pre-selected sequence under conditions sufficient to result in the removal of the uracil base of at least one of said dU residues, to thereby form a protruding terminus capable of hydrogen bonding to a complementary sequence on at least one strand of said modified desired molecule; (C) incubating said treated modified molecule of step (B) in the presence of a modified vector having at least one protruding single-stranded terminus, and being capable of hydrogen bonding to at least one of said protruding terminus of said modified desired DNA molecule, to thereby incorporate said double-stranded linear desired nucleic acid molecule into said double-stranded vector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification