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Preparative‐scale isoelectric trapping by recursive electrophoresis in a compartmentalized system having orthogonal primary and secondary pH gradients. Part 1 – Construction and standard operation
Author(s) -
North Robert Y.,
Vigh Gyula
Publication year - 2011
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.201100119
Subject(s) - analyte , isoelectric focusing , trapping , electrophoresis , chemistry , chromatography , isoelectric point , electrode , analytical chemistry (journal) , current (fluid) , biological system , biochemistry , biology , enzyme , physics , ecology , thermodynamics
The performance of the current preparative‐scale isoelectric trapping systems is limited by the serial arrangement of the separation compartments. A new system has been developed that achieves trapping by recursive electrophoresis in a compartmentalized system (T‐RECS). T‐RECS features (i) parallel‐connected elementary separation heads with independent electrode compartments, feed compartments, and harvest compartments, (ii) orthogonal primary pH gradients and secondary pH gradients, (iii) directionally controlled convective analyte transport along the primary (resolving) pH gradients, and (iv) electrophoretic analyte transport along the secondary (harvesting) pH gradients. The operation of T‐RECS has been quantitatively characterized via separation of small molecule ampholytes.