• Development of an electrochemical DNA biosensor for detection of specific Mycobacterium tuberculosis sequence based on poly(L-glutamic acid) modified electrode

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    • Keywords


      Poly(L-glutamic acid); DNA sensor; Mycobacteriumtuberculosis.

    • Abstract


      An electrochemical DNA biosensor was developed by avidin-biotin interaction of a biotinylated probe and avidin-attached, poly(L-glutamic) acid coated pencil graphite electrode (PGA/PGE) for detection of specific Mycobacterium tuberculosis DNA sequence. The discrimination of fully complementary hybridization and mismatch hybridization was carried out by electrochemical reduction current of Meldola’s Blue (MDB) in square wave voltammetry (SWV). The calibration graph of the DNA biosensor was linear between 1.5–12.5 nM and the detection limit was calculated as 1.3 nM. The proposed biosensor successfully discriminated short andlong oligonucleotides related to DNA sequence of Mycobacterium tuberculosis in optimal condition.

    • Author Affiliations



      1. Department of Chemistry, Faculty of Science, Gazi University, 06500, Ankara, Turkey
      2. Bucak School of Health, Mehmet Akif Ersoy University, 15300, Bucak, Burdur, Turkey
    • Dates

  • Journal of Chemical Sciences | News

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