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Journal of Histochemistry and Cytochemistry, Vol. 48, 471-480, April 2000, Copyright © 2000, The Histochemical Society, Inc.


SYMPOSIUM

New Frontiers in Gold Labeling

James F. Hainfelda and Richard D. Powellb
a Biology Department, Brookhaven National Laboratory, Upton, New York
b Nanoprobes, Inc., Stony Brook, New York

Correspondence to: James F. Hainfeld, Biology Department, Brookhaven National Laboratory, Upton, NY 11973. E-mail: hainfeld@bnl.gov

Recent advances in gold technology have led to probes with improved properties and performance for cell biologists: higher labeling density, better sensitivity, and greater penetration into tissues. Gold clusters, such as the 1.4-nm Nanogold, are gold compounds that can be covalently linked to Fab' antibody fragments, making small and stable probes. Silver enhancement then makes these small gold particles easily visible by EM, LM, and directly by eye. Another advance is the combination of fluorescent and gold probes for correlative microscopy. Chemical crosslinking of gold particles to many biologically active molecules has made possible many novel probes, such as gold–lipids, gold–Ni–NTA, and gold–ATP. (J Histochem Cytochem 48: 471–480, 2000)

Key Words: gold, immunogold, electron microscopy, gold labeling, gold clusters, immunocytochemistry, colloidal gold, Nanogold


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