Oligodeoxynucleotide-modified capillary for electrophoretic separation of single-stranded DNAs with a single-base difference

Takahisa Anada, Masako Ogawa, Hisashi Yokomizo, Yoshihisa Ozaki, Tohru Takarada, Yoshiki Katayama, Mizuo Maeda

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)

    Abstract

    We describe here a method of affinity capillary electrophoresis in which oligodeoxynucleotide (ODN) was immobilized onto the inner surface of the capillary. The immobilized ODN functioned successfully as an affinity ligand for sequence-based DNA separation. Six- or 12-mer ODN with a sequence complementary to one of the c-K-ras gene was used as an immobilized ligand. When the 12-mer ODN was used, the detection peak for the complementary ODN disappeared selectively, while the single-base mutant was detected as usual. In contrast, when the 6-mer ODN was used as the affinity ligand with a mixture of the complementary ODN and its single-base mutant, it was possible to detect both as completely separate peaks. That is, the separation mode was dependent on the base number of the immobilized ODN used as an affinity ligand.

    Original languageEnglish
    Pages (from-to)73-77
    Number of pages5
    Journalanalytical sciences
    Volume19
    Issue number1
    DOIs
    Publication statusPublished - Jan 1 2003

    All Science Journal Classification (ASJC) codes

    • Analytical Chemistry

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