We have developed three electrophoretic methods for analytical and preparative separation of native and heat-denatured beta-lactoglobulin. The methods can be applied, e.g., to optimize dairy milk processing, especially in laboratories which are not provided with expensive column chromatographic instruments. The methods consist of native PAGE followed by electroelution. Consequently, the eluted proteins are in solution in a biologically active and native form, and can therefore be used immediately for further analyses.
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