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- W1967866469 abstract "Food allergies represent an important health problem in industrialized countries, such that detection and quantitative analysis of the protein considered to be the main allergen is crucial. A dot-blot fluorescent staining method for the detection and quantitative analysis of protein residues in food grade amino acids and nucleic acids is presented. This method combines fluorescence staining with dot-blotting onto PVDF membrane. Several standard proteins, such as bovine serum albumin (66 kDa), lysozyme (14 kDa), ubiquitin (8.6 kDa), bovine insulin (5.7 kDa), and oxidized insulin B chain (3.5 kDa), were detectable at 0.1 ppm using SYPRO Ruby blot stain. Twenty-five different amino acids and two different nucleic acids of food grade were analyzed using this method combined with an internal standard addition method using BSA as an internal standard. All amino acids and nucleic acids were dissolved in 3.6% aqueous HCl and dot-blotted onto PVDF membrane before a large amount of amino acids and nucleic acid were removed. Protein residues and the internal standard protein immobilized on the membrane were stained using SYPRO ruby blot stain. The internal standard in all samples was detectable at 0.1 ppm. Samples were dissolved at 120 or 70 mg/mL, according to their solubility under acidic conditions. The detection limit of protein residues per weight was 0.8−1.4 ppm in amino acids and nucleic acids; residual protein was not detected in any sample. Keywords: Amino acid; nucleic acid; monosodium glutamate; protein; allergen; quantification" @default.
- W1967866469 created "2016-06-24" @default.
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- W1967866469 date "2004-07-24" @default.
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- W1967866469 title "Detection and Quantification of Protein Residues in Food Grade Amino Acids and Nucleic Acids Using a Dot-Blot Fluorescent Staining Method" @default.
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- W1967866469 doi "https://doi.org/10.1021/jf0496696" @default.
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