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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Righetti, Pier Giorgio Candiano, Giovanni |
| Description | Country affiliation: Italy Author Affiliation: Righetti PG ( Department of Chemistry, Materials and Chemical Engineering Giulio Natta, Politecnico di Milano, Via Mancinelli 7, 20131 Milano, Italy. piergiorgio.righetti@polimi.it) |
| Abstract | The four classical modes of electrophoresis of protein molecules (sodium dodecyl sulphate electrophoresis, SDS-PAGE, isoelectric focusing, IEF, and immobilized pH gradients, IPGs, two-dimensional maps, 2D, and capillary electrophoresis, CE) are here reviewed, with special emphasis on recent innovations. Thus, in the case of SDS-PAGE, a novel method, consisting in focusing SDS-protein micelles against a gradient of cationic charges grafted onto a polyacrylamide gel is presented. In the case of IEF, the recent decoding of the structure, polydispersity, molecular mass distribution and buffering properties of the soluble carrier ampholyte buffers are here discussed. In regard to two dimensional mapping, recent instrumentation for performing 2D maps in horizontal, large gel slabs (up to 30 cm × 40 cm) and in a radial format for the SDS dimension is here evaluated. Finally, in the case of CE, three major applications are presented: a thorough study of capillary IEF and of all experimental variables, a method of importance in screening of rDNA products; the possibility of running proteins and peptide separations in very acidic, amphoteric, isoelectric buffers in absence of any capillary coating; finally, the possibility of producing a facile, user friendly, covalent coating of the wall silanols via bonding of quaternarized piperazines endowed with an iodinated tail. In acidic, volatile buffers, such protein/peptide runs can be directly interfaced with mass spectrometry instrumentation. |
| ISSN | 00219673 |
| Issue Number | 49 |
| Volume Number | 1218 |
| e-ISSN | 18733778 |
| Journal | Journal of Chromatography A |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2011-12-09 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Electrophoresis Methods Proteins Chemistry Trends Humans Analysis Isolation & Purification Journal Article Research Support, Non-u.s. Gov't Review Discipline Analytical Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Organic Chemistry Medicine Analytical Chemistry Biochemistry |
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