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Kinetic Silver Staining of <strong>Protein</strong>s 51<br />

9<br />

Kinetic Silver Staining of <strong>Protein</strong>s<br />

Douglas D. Root and Kuan Wang<br />

1. Introduction<br />

Silver staining methods have long been know to provide highly sensitive detection<br />

of proteins and nucleic acids following electrophoresis in agarose and polyacrylamide<br />

gels (1,2). Silver staining technologies can be extended to other media such as blots,<br />

thin-layer chromatography (TLC), and microtiter plates. The quantification of proteins<br />

adsorbed to microtiter plate wells provides quantitative information for enzyme-linked<br />

immunosorbent assay (ELISA) and protein interaction assays. One nonradioactive procedure,<br />

copper iodide staining, is described in Chapter 51 (3). The kinetic silver staining<br />

method for measuring the amount of adsorbed protein in a microtiter plate has been<br />

developed recently. The microtiter plate assay has a sensitivity similar to copper iodide<br />

staining (5–150 ng/well) but higher precision (

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