A traditional immobilized pH gradient (IPG) has a high stability for isoelectric focusing (IEF) but suffers from time-consuming rehydration, focusing and staining-imaging as well as complex performance. To address these issues, an IEF system with an array of 24 IPG columns (10 mm × 600 μm × 50 μm) and dynamic scanning imaging (DSI) was firstly designed for protein focusing. Moreover, two IPG columns (pH 4-9 and pH 6.
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