منابع مشابه
New enzymatic assay of iron in serum.
A new enzymatic method for assaying iron in serum samples, suitable for automated analyzers, is reported. Three reagent mixtures are used: dilution buffer (pH 3.0; ascorbate), reagent 1 (pH 6.7; apoaconitase), and reagent 2 (pH 7.7; citrate, magnesium, and isocitrate dehydrogenase). Sera are diluted with dilution buffer. Fe3+ is liberated from transferrin in sera under acidic conditions, and th...
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We describe a new and improved enzymatic assay for determining the concentration of D-mannose in sera. Serum D-glucose is selectively converted to glucose-6 phosphate with the highly specific thermostable glucokinase (EC 2.7.1.2) from Bacillus stearothermophilus. The anionic reaction products and excess substrates are removed by a rapid and simple anion-exchange chromatography step in microcent...
متن کاملNew enzymatic assay for glycohemoglobin.
BACKGROUND Previous methods to measure glycohemoglobin (GHb) have been time-consuming or imprecise; we therefore developed a new enzymatic assay for GHb. METHODS Blood cells were first hemolyzed, and hemoglobin was digested with protease to yield fructosyl amino acid. Fructosyl amino acid oxidase acts on the fructosyl amino acid and generates hydrogen peroxide, which reacts with chromogens in...
متن کاملEnzymatic rate assay of creatinine in serum and urine.
A two-step method for assaying creatinine in serum and urine samples, suitable with automated analyzers, is reported. Reagent 1, for the first step, contains a blanking system [creatine amidinohydrolase (CRTase), urease, glutamate dehydrogenase, NADPH, and 2-oxoglutarate] and a NADPH-regenerating system [Mg(2+)-dependent isocitrate dehydrogenase (ICD), MgCl2, and excess isocitrate]. Reagent 2, ...
متن کاملEnzymatic assay of calcium in serum with phospholipase D.
(10) of 2.0 g/L and Holt et al. (12) of Ͻ3.0 g/L. HPLC-MS has no detectable interference with respect to endogenous compounds. The quantification limits based on acceptable imprecision, recovery, and ability to discriminate from potential interferences within the calibration range of the MEIA are 3.0 g/L (the lower limit of quantification) to 22.0 g/L. We have demonstrated that a higher lim...
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ژورنال
عنوان ژورنال: Clinical Chemistry
سال: 1994
ISSN: 0009-9147,1530-8561
DOI: 10.1093/clinchem/40.5.763