[Evaluation of an immunoenzymatic method for determining the tumor marker CA 15-3)]

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E Baghino1, G Dalmasso, G Magrí

  • 1Laboratorio Analisi, USL n. 1-Presidio Ospedaliero, Imperia.

Minerva Medica
|October 1, 1996
PubMed

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Enzyme-Linked Immunosorbent Assay01:33

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.