In a chemiluminescent immunologic assay, what is the signal detected?

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Study for the Success! In Clinical Laboratory Science – Immunology Test. Prepare with flashcards and multiple choice questions, each question offers hints and explanations. Get ready for your exam!

Multiple Choice

In a chemiluminescent immunologic assay, what is the signal detected?

Explanation:
In chemiluminescent immunoassays, the signal comes from light produced by a chemical reaction. An enzyme on the labeled antibody catalyzes a substrate to emit photons, and a photodetector (like a photomultiplier) measures the intensity of that light. The readout is the light signal, which correlates with the amount of target present. This is different from colorimetric assays that rely on visible color changes, and while the instrument converts the detected light into an electrical signal for measurement, the fundamental signal generated by the reaction is photons—light.

In chemiluminescent immunoassays, the signal comes from light produced by a chemical reaction. An enzyme on the labeled antibody catalyzes a substrate to emit photons, and a photodetector (like a photomultiplier) measures the intensity of that light. The readout is the light signal, which correlates with the amount of target present. This is different from colorimetric assays that rely on visible color changes, and while the instrument converts the detected light into an electrical signal for measurement, the fundamental signal generated by the reaction is photons—light.

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