Clinical Chemistry
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Clinical Chemistry 46: 1478-1486, 2000;
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(Clinical Chemistry. 2000;46:1478-1486.)
© 2000 American Association for Clinical Chemistry, Inc.

Articles

Bioconjugates of Intelligent Polymers and Recognition Proteins for Use in Diagnostics and Affinity Separations

Allan S. Hoffman1

1 Bioengineering Department, University of Washington, Box 352255, Seattle, WA 98195.

Polymers that respond to small changes in environmental stimuli with large, sometimes discontinuous changes in their physical state or properties are often called "intelligent" or "smart" polymers. We have conjugated these polymers to different recognition proteins, including antibodies, protein A, streptavidin, and enzymes. These bioconjugates have been prepared by random polymer conjugation to lysine amino groups on the protein surface, and also by site-specific conjugation of the polymer to specific amino acid sites, such as cysteine sulfhydryl groups, that are genetically engineered into the known amino acid sequence of the protein. We have conjugated several different smart polymers to streptavidin, including temperature-, pH-, and light-sensitive polymers. The preparation of these conjugates and their many fascinating applications are reviewed here.






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