RADIOIMMUNOASSAY (RIA)

A technique to determine the concentration of a substance in a blood or tissue sample. A mixture of the substance to be measured and a form of the substance that has been radioactively tagged are allowed to react with an antibody specific to the substance. The amount of radioactivity bound by the antibody indicates the amount of the substance in the sample.

RADIOIMMUNOASSAY (RIA): "The radioimmunoassay showed the amount of the substance the doctor was expecting."
Cite this page: N., Pam M.S., "RADIOIMMUNOASSAY (RIA)," in PsychologyDictionary.org, April 28, 2013, https://psychologydictionary.org/radioimmunoassay-ria/ (accessed October 17, 2019).
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