scintillation proximity assay

scintillation proximity assay
Assay system in which antibody or receptor molecule is bound to a bead that will emit light when b emission from an isotope occurs in close proximity, ie. from a radioactively-labelled ligand. Avoids the need for scintillant in order to measure the amount of bound isotope - and thus the amount of antigen or ligand present.

Dictionary of molecular biology. 2004.

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