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Enzyme Linked Immuno Sorbant Assay (ELISA) is so sensitive because of the detection method, i.e. using antibody, and visual detection. A positive control is needed because of the relative selectivity of the antibody. It can always bind to other stuff and give artifactually high values. Nonspecific, unoccupied binding sites in the microtiter plate (as well as other places) have to be blocked or they will give a signal as though they were the analyte of interest.

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Q: Describe the mechanism of Enzyme linked Immunosorbent Assay ELISA?
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What does the medical abbreviation ELISA mean?

Enzyme linked immunosorbent assay. It's a kind of test process.It is a medical technique for finding the presence of an antibody or an antigen in a sampling.Literally it stands for Enzyme Linked Immunosorbent Assay.


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It depends on the enzyme that you want to test. If the enzyme uses or produces a compound that is detectable, and you know what compounds the enzyme needs to use/produce this, you can add a known amount of the substrate (the compound that is used) to the enzyme and measure the product (the compound that is produced) over time.Answers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comAnswers.comThis approach only works if there is only one enzyme that can act on the compound you are measuring.If you already have that enzyme in pure form you can make an antibody against it and do an Enzyme linked immunosorbent assay (ELISA) or a Western blot, which will give you a signal if the enzyme is present.


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