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The intensity of the color, and hence the absorption at 540 nm, is directly proportional to the protein concentration, according to the Beer–Lambert law. Despite its name, the reagent does not in fact contain biuret [(H 2 N−CO−) 2 NH]. The test is named so because it also gives a positive reaction to the peptide-like bonds in the biuret ...
Concentrations above the reference range are found in paraproteinaemia, Hodgkin's lymphoma, leukaemia or any condition causing an increase in immunoglobulins. Total protein is also commonly elevated in dehydration and C677T gene mutation. Reference ranges for blood tests, with total plasma protein (shown in purple at right) with other constituents.
Reference ranges (reference intervals) for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples. Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry"), the ...
Researchers have identified protein signatures in blood tests that can be used to detect or predict up to 67 diseases, using UK Biobank data in a cohort of nearly 42,000 participants.
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 ...
Blood plasma protein 3.5-5.0 ... normal range 2-62 × 10 −9: chronic poisoning ... Reference ranges for common blood tests; References
The biuret test is a chemical test for proteins and polypeptides. It is based on the biuret reagent, a blue solution that turns violet upon contact with proteins, or any substance with peptide bonds. The test and reagent do not actually contain biuret; they are so named because both biuret and proteins have the same response to the test.
Bradford protein assay: Detection in the range of ~1 mg/mL; Biuret Test Derived Assays: Bicinchoninic acid assay (BCA assay): Detection down to 0.5 μg/mL; Lowry Protein assay: Detection in the range of 0.01–1.0 mg/mL; Fluorescamine: Quantifies proteins and peptides in solution if primary amine are present in the amino acids