Radioimmunoassay (IV)

Method of Measuring Polypeptides by Radioimmunoassay

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Triiodothyronine radioimmunoassay.

Highly specific antisera to triiodothyronine (T(3)) were prepared by immunization of rabbits with T(3)-bovine serum albumin conjugates. Antisera with T(3) binding capacity of up to 600 ng/ml were obtained. The ability of various thyronine derivatives to inhibit the binding of T(3-) (125)I to anti-T(3) serum was found to vary considerably. l-T(3), d-T(3) and several triiodoanalogues were potent ...

Phytochrome radioimmunoassay.

A phytochrome radioimmunoassay with a detection limit of about 2 nanograms has been developed. The radioimmunoassay does not suffer from the potential drawbacks of the commonly used spectral assay and requires less than 1 microliter of crude extract from dark-grown plants for quantitation of phytochrome. Measurement of phytochrome in crude extracts by radioimmunoassay gives values about 25% gre...

Rapid radioimmunoassay of triiodothyronine.

The method used in this report is based on the immunological production of a specific antisera to tnlodothyronine (T3) in rabbits. Conducted at 4 #{176}C, the radioimmunoassay requires three to five days to complete. Hoping to speed this assay, we investigated the influence of time, temperature, and pH. Incubation at 37 #{176}C and pH 8.0 for 30 mm did not deleteriously affect either precision,...

Radioimmunoassay and related techniques.