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  • Title: Two-dimensional gel electrophoresis/matrix-assisted laser desorption/ionisation mass spectrometry of commercial bovine milk.
    Author: Galvani M, Hamdan M, Righetti PG.
    Journal: Rapid Commun Mass Spectrom; 2001; 15(4):258-64. PubMed ID: 11223956.
    Abstract:
    Proteins in commercial bovine milk have been separated by two-dimensional gel electrophoresis and examined by matrix-assisted laser desorption/ionisation mass spectrometry. Gel separation was conducted in two different pH gradients, 3-10 and 6-11; the latter range resulted in a higher spot resolution and favoured the basic proteins. We have limited the time-of-flight mass spectrometry analysis to the linear mode to examine the capability of reliable relative molecular masses of the intact proteins in their characterisation. The present study draws attention to the difficulty of identifying basic proteins with low molecular masses (below 12000 Da) that are commonly encountered in milk samples.
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