Figure 2From: Immobilized pH gradient-driven paper-based IEF: a new method for fractionating complex peptide mixtures before MS analysisMini gel SDS-PAGE analysis of protein fractions resulting from PIEF using a known protein, beta lactoglobulin, and a pH 3-10 IPG strip (gel stained with Sypro Ruby). Lanes 1-17: fractions from paper strips 1-17.Back to article page