Electrochemical Detection of Avian Influenza Virus Genotype Using Amino-ssDNA Probe Modified Gold Electrodes

A DNA biosensor for the detection of specific oligonucleotide sequences of Avian Influenza Virus type H5N1 has been proposed. The NH2‐ssDNA probe was deposited onto a gold electrode surface to form an amide bond between the carboxyl group of thioacid and the amino group from ssDNA probe. The signals...

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Bibliographic Details
Published in:Electroanalysis (New York, N.Y.) N.Y.), 2013-08, Vol.25 (8), p.1871-1878
Main Authors: Malecka, Kamila, Grabowska, Iwona, Radecki, Jerzy, Stachyra, Anna, Góra-Sochacka, Anna, Sirko, Agnieszka, Radecka, Hanna
Format: Article
Language:English
Subjects:
Amino-ssDNA probe
Avian Influenza Virus
Electrochemical genosensor
Gold electrode
PCR products
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Summary:A DNA biosensor for the detection of specific oligonucleotide sequences of Avian Influenza Virus type H5N1 has been proposed. The NH2‐ssDNA probe was deposited onto a gold electrode surface to form an amide bond between the carboxyl group of thioacid and the amino group from ssDNA probe. The signals generated as a result of hybridization were registered in square wave voltammetry and electrochemical impedance spectroscopy in the presence of [Fe(CN)6]3−/4− as a redox marker. The genosensor is capable to determine 20‐mer and 180‐bp (PCR products) oligonucleotides complementary sequences with detection limit in the fM range. The genosensor displays good selectivity and sensitivity. The 20‐mer as well as 180‐bp oligonucleotides without a complementary sequence generate very low signal.
ISSN:1040-0397
1521-4109
DOI:10.1002/elan.201300113