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  2. Bradford protein assay - Wikipedia

    en.wikipedia.org/wiki/Bradford_protein_assay

    The Bradford protein assay (also known as the Coomassie protein assay) was developed by Marion M. Bradford in 1976. [1] It is a quick and accurate [2] spectroscopic analytical procedure used to measure the concentration of protein in a solution. The reaction is dependent on the amino acid composition of the measured proteins.

  3. Biuret test - Wikipedia

    en.wikipedia.org/wiki/Biuret_test

    Buffers, such as Tris and ammonia interfere with this assay, therefore rendering this assay inappropriate for protein samples purified from ammonium sulfate precipitation. Due to its insensitivity and little interference by free amino acids, this assay is most useful for whole tissue samples and other sources with high protein concentration. [5]

  4. Protein methods - Wikipedia

    en.wikipedia.org/wiki/Protein_methods

    Bradford assay method uses a dye to bind to protein. Most commonly, Coomassie brilliant blue G-250 dye is used. When free of protein, the dye is red but once bound to protein it turns blue. [11] The dye-protein complex absorbs light maximally at the wavelength 595 nanometers and is sensitive for samples containing anywhere from 1 ug to 60 ug.

  5. Bicinchoninic acid assay - Wikipedia

    en.wikipedia.org/wiki/Bicinchoninic_acid_assay

    BCA protein assay in a 96 well plate. The bicinchoninic acid assay (BCA assay), also known as the Smith assay, after its inventor, Paul K. Smith at the Pierce Chemical Company, [1] now part of Thermo Fisher Scientific, is a biochemical assay for determining the total concentration of protein in a solution (0.5 μg/mL to 1.5 mg/mL), similar to Lowry protein assay, Bradford protein assay or ...

  6. ELISA - Wikipedia

    en.wikipedia.org/wiki/ELISA

    The assay is a solid-phase type of enzyme immunoassay (EIA) to detect the presence of a ligand (commonly a protein) in a liquid sample using antibodies directed against the ligand to be measured. ELISA has been used as a diagnostic tool in medicine, plant pathology , and biotechnology , as well as a quality control check in various industries.

  7. Proximity extension assay - Wikipedia

    en.wikipedia.org/wiki/Proximity_extension_assay

    The proximity extension assay (PEA) is a method for detecting and quantifying the amount of many specific proteins present in a biological sample such as serum or plasma. [1] The method is used in the research field of proteomics , specifically affinity proteomics, [ 2 ] where in one searches for differences in the abundance of many specific ...

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