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

A simple peptide mapping method by partial filling micellar electrokinetic capillary chromatography with a zwitterionic-nonionic mixed micelle.

A partial filling micellar electrokinetic capillary chromatography (PF-MEKC) method with a mixed micelle system composed of a zwitterionic surfactant named 3-(N,N-dimethylhexadecylammonium)propanesulfonate (PAPS) and a nonionic surfactant polyethylene glycol dodecyl ether (Brij 35) for peptide mapping is described. The method was demonstrated by the separation of tryptic digestion of bovine serum albumin ( BSA). The optimal mixed micelle solution was 50mM NH(4)OH-HCOOH buffer (pH 2.0) containing 32mM PAPS and 0.6% (m/v) Brij 35. It was found that the mixed micelle system permitted a highly selective separation of the tryptic digestion. The high separation selectivity was probably due to the ion-pairing interaction between the zwitterionic surfactant molecules and the peptides.[1]


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