Electrospray mass spectra from protein electroeluted from sodium dodecylsulfate polyacrylamide gel electrophoresis gels
- 1 May 1999
- journal article
- Published by American Chemical Society (ACS) in Journal of the American Society for Mass Spectrometry
- Vol. 10 (5) , 453-455
- https://doi.org/10.1016/s1044-0305(99)00012-4
Abstract
Electrospray ionization/tandem mass spectrometry of proteins separated on sodium dodecylsulfate polyacrylamide gel electrophoresis (SDS-PAGE) gels is severely limited by the requirement that the protein be completely separated from the SDS. As shown here, the gaseous noncovalent SDS adducts of protonated proteins thus formed can be dissociated by infrared irradiation. ESI spectra from myoglobin in SDS-containing solutions show molecular ions adducted with up to 15 dodecyl sulfates, but ir irradiation of these ions causes complete dissociation to expel the SDS.Keywords
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