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Magnetic relaxation switch immunosensors detect enantiomeric impurities

Andrew Tsourkas1, Oliver Hofstetter, Heike Hofstetter

  • 1Center for Molecular Imaging Research, Massachusetts General Hospital and Harvard Medical School, Building 149, 13th Street, Boston, MA 02129, USA.

Angewandte Chemie (International Ed. in English)
|April 29, 2004
PubMed
Abstract

No abstract available in PubMed .

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Enzyme-Linked Immunosorbent Assay

In 1971, Peter Perlman and Eva Engvall developed an Enzyme-linked immunosorbent assay (ELISA or EIA). ELISA differs from western blot in that the assays are conducted in microtiter plates or in vivo rather than on an absorbent membrane.
There are many different types of ELISAs, but they all involve an antibody molecule whose constant region binds an enzyme, leaving the variable region free to bind its specific antigen.  Enzyme-substrate reaction allows the antigen to be visualized or quantified.