A radioimmunoassay for human thyroglobulin: methodology and clinical applications.


A specific double-antibody radioimmunoassay with a sensitivity of 2.5 ng/ml has been developed for measuring thyroglobulin (Tg) in human serum. As endogenous anti-Tg antibodies in serum interfere in the assay, only sera with a negative tanned red cell (TRC) test are suitable for analysis. Tg was detectable in 84.7% of the euthyroid subjects, with a mean… (More)


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