Published 2009

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Publication details

Journal : Electrophoresis , vol. 30 , p. 1856–1862–7 , 2009

International Standard Numbers :
Printed : 0173-0835
Electronic : 1522-2683

Publication type : Academic article

Contributors : Grove, Harald; Mosleth, Ellen F.; Hollung, Kristin; Martens, Harald

Issue : 11

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Kjetil Aune
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Silver staining is a commonly used protein stain to visualise proteins separated by 2-DE. Despite this, the technique suffers from a limited dynamic range, making the simultaneous quantification of high- and low-abundant proteins difficult. In this paper we take advantage of the fact that silver staining is not an end-point stain by photographing the gels during development. This procedure provides information about the change in measured absorbance for each pixel in the protein spots on the gel. The maximum rate of change was found to be correlated with the amount of applied protein, providing a new way of estimating protein amount in 2-DE gels. We observed an improvement in the dynamic range of silver staining by up to two orders of magnitude.