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  • Title: Ultrastructural localization of intracellular antigens by the use of protein A-gold complex.
    Author: Roth J, Bendayan M, Orci L.
    Journal: J Histochem Cytochem; 1978 Dec; 26(12):1074-81. PubMed ID: 366014.
    Abstract:
    An immunocytochemical technique for the demonstration of intracellular antigens (secretory proteins) on thin sections is reported. Staphylococcal protein A which reacts with the Fc fragment of IgG molecules was labeled with colloidal gold as a marker. The antigenic sites were visualized on aldehyde-fixed and Epon-embedded tissue in a two step procedure. The specific antisera were applied to thin sections for binding to the antigens and then visualized by the protein A-gold complex. By using this technique different secretory proteins of the exocrine and endocrine pancreas were localized. The protein A-gold technique is proposed as a general method for visualization of antigenic sites on thin sections.
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