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Routine native immobilized pH gradient isoelectric focusing (IPG-IEF) and two-dimensional gel electrophoresis (2DE) are still suffering from unfortunate reproducibility, poor resolution (caused by protein precipitation) and instability in characterization of intact protein isoforms and posttranslational modifications. Based on the concept of moving reaction boundary (MRB), we firstly proposed a tunable...
A simple capillary array IEF device was developed for high resolution and micropreparative separation of trace amounts of proteins. Based on quasi-chip-scale manufacturing, the specific capillaries (600μm i.d., 1200μm o.d. and 20mm length) were integrated with the miniaturized polymethyl-methacrylate electrode trays. Electroosmotic flow was suppressed effectively by modified cross-linked polyacrylamide...
Hemoglobin A 1c (HbA 1c ) has been proven to be a key biomarker for diabetes screening, and glutathiolation of HbA 1c (viz., GSS-HbA 1c ) has been identified. However, the impact of GSS-HbA 1c on the measurement of HbA 1c for diabetes screening has not been quantitatively assessed yet. To address the issue, the micropreparative capillary isoelectric...
An immobilized pH gradient (IPG) has strong power against instability (e.g., drifting and plateau) existing in classic isoelectric focusing (IEF). However, the relevant mechanism against the instability of pH gradient is still unclear. In this work, the theories of diffusional current and water products in IEF were developed based on the Svensson–Tiselius's differential equation and concept of moving...
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