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Memórias do Instituto Oswaldo Cruz

On-line version ISSN 1678-8060

Mem. Inst. Oswaldo Cruz vol.85 no.1 Rio de Janeiro Jan./Mar. 1990 

An improved silver staining procedure for schizodeme analysis in polyacrylamide gradient gels

Antonio M. Gonçalves1  , Nedia S. Nehme1  , Carlos M. Morel1 

Instituto Oswaldo Cruz, Departamento de Bioquímica e Biologia Molecular, Rio de Janeiro, Brasil


A simple protocol is described for the silver staining of polyacrylamide gradient gels used for the separation of restriction fragments of kinetoplast DNA [schizodeme analysis of trypanosomatids (Morel et al., 1980)]. The method overcomes the problems of non-uniform staining and strong background color which are frequently encountered when conventional protocols for silver staining of linear gels. The method described has proven to be of general applicability for DNA, RNA and protein separations in gradient gels.

Key words: silver staining; schizodeme analysis; DNA; RNA; protein; trypanosomatids


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