Premium
Electroelution of nonfluorescent stacked proteins detected by fluorescence optics from gel electrophoretic bands for transfer into mass spectrometry
Author(s) -
Gombocz Erich,
Chrambach Andreas,
Yefimov Stanislav,
Yergey Alfred L.
Publication year - 2000
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/(sici)1522-2683(20000301)21:5<846::aid-elps846>3.0.co;2-l
Subject(s) - electroelution , chemistry , mass spectrometry , fluorescence , electrophoresis , chromatography , stacking , gel electrophoresis , analytical chemistry (journal) , polyacrylamide gel electrophoresis , biochemistry , physics , organic chemistry , quantum mechanics , enzyme
The extreme accuracy of spectrometrically determined masses of proteins has opened the possibility to identify proteins separated as gel electrophoretic bands in the absence of specific immunologic ways of identification. For the purpose of protein transfer from gel electrophoretic bands to mass spectrometer, electroelution from the intact gel has advantages, in particular when apparatus with capacity for fluorescent scanning allows one to direct the electroelution cell over the band under computer control. To avoid fluorescent labeling of the protein which is incompatible with mass spectrometric identification, it is proposed to selectively stack the unlabeled protein and detect it by comigrating tracking dye prior to electroelution. The feasibility of the approach is exemplified in case of a single protein, but still remains to be demonstrated in conjunction with the selective stacking or unstacking of a single protein from a mixture of several proteins.