Abstract
The silver staining technique of Merril et al. (1981) was used to identify antigens separated by SDS-PAGE after dissociation of immune complexes purified by absorption with staphylococcus A protein. The five and four dominating structural components of measles and RS virus ( M r range 28,000 to 79,000) respectively precipitated with monoclonal antibodies were readily identified, except when the M r of the virus-specific antigen was in the same range as immunoglobulin heavy and light chains. Specific antigens were identified less effectively after precipitation with polyclonal sera because of a larger background of stainable proteins. This method, which combines the sensitivity and high resolution of silver staining and the specificity of immune complexing with monoclonal antibodies, is rapid and inexpensive.
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