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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Determination of adenosine deaminase activity in human erythrocytes by on-column capillary isotachophoresis-capillary zone electrophoresis in the presence of electroosmotic flow.

Transient capillary isotachophoresis (CITP)-capillary zone electrophoresis (CZE) in presence of electroosmotic flow (EOF) was utilized for the measurement of adenosine deaminase activity in human erythrocytes. Phosphates, dominant anions of the sample matrix, were used as leading ions for transient isotachophoresis, and borates (0.3 M, pH 10) were used as terminating ions and background electrolyte for CZE. Final experimental conditions made it possible to inject 70% of the total capillary volume (1.45 microL) with the sample. Enzymatic conversion products (inosine and hypoxanthine), present in the sample in the low-micromolar range, were determined using optimized conditions. The limit of detection was 28 nM using UV detection at 202 nm. The presented data shows that CITP-CZE can be performed in uncoated capillaries in the presence of strong EOF.[1]

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