نتایج جستجو برای: enzymatic assay

تعداد نتایج: 272226  

Journal: :Journal of Evolution of Medical and Dental Sciences 2012

Journal: :Clinical Chemistry and Laboratory Medicine 1979

Journal: :Frontiers in chemistry 2016
E. N. G. Marsh

Journal: :Structure 2000
D Blow

Between 1930 and 1975 biochemical and structural analysis of enzymes led to a clear set of ideas that might form a basis for detailed understanding of enzyme action. Further development required energetic and thermodynamic analysis of enzymes in an aqueous medium, beyond the computational power then available. Structural enzymology advanced in other directions, but the fundamental questions of ...

Journal: :Analytical biochemistry 1987
J A Shayman A R Morrison O H Lowry

The determination of myo-inositol trisphosphate by an enzymatic fluorometric assay is presented. The method involves the acid extraction of water-soluble inositol polyphosphates followed by separation by anion-exchange chromatography. Samples are subsequently neutralized by passage over a Dowex Cl- resin and elution with lithium chloride. Samples are then desalted with ethanol. Following dephos...

Journal: :Clinical chemistry 1979
B A Humphries M Melnychuk E J Donegan R D Snee

An enzymatic method for determining plasma ammonia with the Du Pont Automatic Clinical Analyzer (aca) is described. The assay requires a sample volume of 500 muL for a kinetic ammonia measurement. The reaction is initiated with glutamate dehydrogenase and the rate of depletion of NADPH is monitored with two measurements, 17 s apart, at 340 nm. Reaction conditions have been optimized for maximum...

Journal: :Clinical chemistry 2004
Qinghong Han Mingxu Xu Li Tang Xinghua Sun Nan Zhang Xuezhong Tan Xiuying Tan Yuying Tan Robert M Hoffman

Patients with vascular disease have significantly higher concentrations of plasma total cysteine (tCYS) than do healthy individuals (1–7). The present method is a new, rapid, and sensitive enzymatic colorimetric assay for tCYS in plasma samples and is homogeneous in that it avoids separation methods. The tCYS assay uses only the recombinant enzymes methionine , -lyase (rMETase) and Sadenosylhom...

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