Enzyme-catalyzed metal deposition for the enhanced in situ...

Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving antigen-antibody binding – specific binding protein...

Reexamination Certificate

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C435S006120, C435S007100, C435S014000, C435S019000, C435S021000, C435S040500, C435S040520, C435S188000, C436S503000, C436S518000, C436S164000, C549S218000, C549S398000, C558S190000

Reexamination Certificate

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07632652

ABSTRACT:
The invention is directed to novel compositions of matter and methods of detecting in situ an immunohistochemical epitope or nucleic acid sequence of interest in a biological sample comprising binding an enzyme-labeled conjugate molecule to the epitope or sequence of interest in the presence of a redox-inactive reductive species and a soluble metal ion, thereby facilitating the reduction of the metal ion to a metal atom at or about the point where the enzyme is anchored. Novel phosphate derivatives of reducing agents are described that when exposed to a phosphatase are activated to their reducing form, thereby reducing metal ions to insoluble metal.

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