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      Spectrophotometric Assay Using o-Phthaldialdehyde for Determination of Proteolysis in Milk and Isolated Milk Proteins

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      Journal of Dairy Science
      American Dairy Science Association

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          Assay of proteins in the presence of interfering materials

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            Fluorescence reaction for amino acids.

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              O-phthalaldehyde: fluorogenic detection of primary amines in the picomole range. Comparison with fluorescamine and ninhydrin.

              O-Phthalaldehyde, in the presence of 2-mercaptoethanol, reacts with primary amines to form highly fluorescent products. Picomole quantities of amino acids, peptides, and proteins can be detected easily. o-Phthalaldehyde is five to ten times more sensitive than fluorescamine and is soluble and stable in aqueous buffers.
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                Author and article information

                Journal
                Journal of Dairy Science
                Journal of Dairy Science
                American Dairy Science Association
                00220302
                June 1983
                June 1983
                : 66
                : 6
                : 1219-1227
                Article
                10.3168/jds.S0022-0302(83)81926-2
                2d764e9e-d9ab-4e77-88cc-aac15eeb2552
                © 1983
                History

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