Biospecific labeling with undecagold: visualization of the biotin-binding site on avidin

The biotin-binding site on avidin has been labeled with biotin conjugated to undecagold, an organometallic cluster compound containing 11 gold atoms in a core angestroms in diameter. Examination of unstained specimens by scanning transmission electron microscopy reveals the labeled sites directly, w...

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Bibliographic Details
Published in:	Science (American Association for the Advancement of Science) Vol. 218; no. 4569; p. 290
Main Authors:	Safer, D, Hainfeld, J, Wall, J S, Reardon, J E
Format:	Journal Article
Language:	English
Published:	United States 15.10.1982
Subjects:	Avidin - metabolism Binding Sites Biotin - metabolism Gold - metabolism Organogold Compounds Organometallic Compounds - metabolism Ovalbumin - analogs & derivatives
ISSN:	0036-8075
Online Access:	Get more information
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Summary:	The biotin-binding site on avidin has been labeled with biotin conjugated to undecagold, an organometallic cluster compound containing 11 gold atoms in a core angestroms in diameter. Examination of unstained specimens by scanning transmission electron microscopy reveals the labeled sites directly, without computational averaging or filtering of the images. This approach should be widely applicable for determining the locations of subunits and functional site in biological macromolecules at a resolution at a resolution in range of 15 angstroms.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0036-8075
DOI:	10.1126/science.7123234