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High Sensitive Detection of Cry1Ab Protein Using a Quantum Dot-Based Fluorescence-Linked Immunosorbent Assay.

Summary of "High Sensitive Detection of Cry1Ab Protein Using a Quantum Dot-Based Fluorescence-Linked Immunosorbent Assay."

Protein-based detection methods, enzyme-linked immunosorbent assay (ELISA) and lateral flow strip, have been widely used for rapid, spot, and sensitive detection of genetically modified organisms (GMOs). Herein, one novel quantum dot-based fluorescence-linked immunosorbent assay (QD-FLISA) was developed employing quantum dots (QDs) as the fluorescent marker for the detection of the Cry1Ab protein in MON810 maize. The end-point fluorescent detection system was carried out using QDs conjugated with goat anti-rabbit secondary antibody. The newly developed Cry1Ab QD-FLISA assay was highly specific to the Cry1Ab protein and had no cross-reactivity with other target proteins, such as Cry2Ab, Cry1F, and Cry3Bb. The quantified linearity was achieved in the value range of 0.05-5% (w/w). The limits of detection (LOD) and quantification (LOQ) of the QD-FLISA were 2.956 and 9.854 pg/mL, respectively, which were more sensitive than the conventional sandwich ELISA method. All of the results indicated that QD-FLISA was a highly specific and sensitive method for the monitoring of Cry1Ab in GMOs.

Affiliation

National Molecular Characterization Center for Genetically Modified Organisms, School of Life Science and Biotechnology, Shanghai Jiao Tong University , 800 Dongchuan Road, Shanghai 200240, People's Republic of China.

Journal Details

This article was published in the following journal.

Name: Journal of agricultural and food chemistry
ISSN: 1520-5118
Pages: 2184-9

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