The present review concentrates on techniques for the staining and quantification of proteins separated by polyacrylamide gel electrophoresis. Staining with organic dyes has been used for approximately thirty years; the silver staining technique was introduced in 1979. The problems of silver staining are presented separately because the mechanism of this staining is in principle different from staining with organic dyes. Less attention has been devoted to quantification of two-dimensional gels, because this autoradiography is preferred because of its high sensitivity and fewer problems with accurate quantification in contrast to silver staining.

Institute of Physiology Czechoslovak Academy of Sciences Prague

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Morphological and molecular characterization of a spontaneously tuberizing potato mutant: an insight into the regulatory mechanisms of tuber induction