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Journal of Electron Microscopy 43(6): 361-366 (1994)
© 1994 Oxford University Press

Use of Nanogold Followed by Silver Enhancement and Gold Toning for Preembedding Immunolocalization in Osmium-fixed, Epon-embedded Tissues

Hajime Sawada and Michiyo Esaki

Department of Anatomy, Yokohama City University, School of Medicine Fukuura 3-9, Kanazawa-ku, Yokohama, 236 Japan

A reliable, sensitive, high-resolution method with good structural visualization for preembedding immunoelectron microscopy was proposed. The present technique involves the following processes. Immunolabeling of cryostat sections with primary antibodies and with nanogolds, silver intensification for visualization of nanogold secondary antibodies, gold-toning for stabilization of silver shells, and osmium postfixation and embedding in Epon for good structural visualization. The technique was applied to rat testis with anti-laminin and anti-fibronectin antibodies, showing that these two proteins are localized differentially in the lamina propria of the tissue.

Keywords     nanogold, silver-intensification, gold toning fibronectin, laminin, testis

Received     20 June 1994, accepted 13 September 1994


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