Dna sequencing method and dna sample preparation method

Details Dna sequencing method and dna sample preparation method Dna sequencing method and dna sample preparation method

C - Chemistry, Metallurgy

12

Q

C12Q 1/68 (2006.01)

Patent

CA 2185590

The DNA sequencing of the present invention comprises: (1) a step of digesting a sample DNA with a restriction enzyme to obtain a DNA fragment; (2) a step of introducing an oligonucleotide having a definite base sequence into the DNA fragment at the 3' terminus thereof; (3) a step of performing a complementary strand extension reaction, using a labeled primer which comprises a first base sequence portion complementary to at least a part of the base sequence of the oligo- nucleotide, a second base sequence portion complementary to the recognition base sequence recognized by the restriction enzyme and a third base sequence of a possible combination of 1 to 4 bases, by using, as a template, a single strand of the DNA fragment having the oligonucleotide introduced thereinto to obtain a labeled extended primer having a base sequence complementary to the single strand of the DNA fragment; (4) a step of proceeding: (a) a step of performing a sequencing reaction using the labeled primer by using, as a template, the single strand of the DNA fragment having the oligo- nucleotide introduced thereinto, and, (b) a step of performing a sequencing reaction using the extended labeled primer by using, as a template, a part of the single strand of the sample DNA having the base sequence of the single strand of the DNA fragment and a contiguous sequence adjacent thereto, or the single strand of the sample DNA; and, (5) a step of subjecting products of the sequencing reaction to electrophoresis to determine the base sequence of the DNA fragment and at least a part of the base sequence of the sample DNA adjacent to the base sequence of the DNA fragment.

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