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Two-dimensional gel electrophoresis (2-DE) is currently a widely used analytical method for resolving complex mixtures of proteins. Sample preparation has a marked influence on 2-DE pattern. To reduce impurities and to increase the low-abundance proteins, protein precipitation is often used for the preparation of samples before 2-DE. In this study, we revealed that addition of SDS prior to TCA precipitation of mycobacterial cell extract proteins increases the resolution of the 2-D gel pattern.
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Bisht et al. (2007) studied this question.
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