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Epitomics: The Rabbit Monoclonal Company
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J. Biophys. and Biochem. Cytol., Vol 11, 521-531, Copyright © 1961 by Rockefeller University Press

ARTICLE

THE USE OF SPECIFIC ANTIBODY IN ELECTRON MICROSCOPY : II. The Visualization of Mercury-Labeled Antibody in the Electron Microscope



Frank A. Pepe Ph.D.1 and H. Finck Ph.D.1

1 From the Department of Anatomy, School of Medicine, University of Pennsylvania, Philadelphia

Glycerinated chicken muscle was stained with antimyosin antibody conjugated with mercury and fluorescein. The antibody was visualized in both the electron and the fluorescence microscope by using adjacent thin and thick sections. In order to make this possible, Araldite was used as the embedding medium. The mercury was reduced to metallic mercury in the electron beam and either migrated in the section or was sublimated in the vacuum. Therefore special techniques of carbon filming had to be used to prevent this. Some nonspecific staining occurred because of the binding of mercury to available sulfhydryl groups in the tissue. The available sulfhydryl groups were blocked by pretreating the tissue with iodoacetic acid and formaldehyde. The non-specific staining which occurred after this treatment was easily removed by brief washing with a buffered solution of thioglycolic acid.

Submitted on January 10, 1961


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