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. 1978 Nov 1;175(2):685–690. doi: 10.1042/bj1750685

A radioimmunoassay for chicken avidin. Comparison with a [14C]biotin-binding method.

M S Kulomaa, H A Elo, P J Tuohimaa
PMCID: PMC1186119  PMID: 743218

Abstract

A double-antibody solid-phase radioimmunoassay for chicken avidin is reported. Avidin was labelled with 125I by the chloramine-T method. The bound and free avidin were separated with a second antibody bound to a solid matrix. In the logit-log scale the standard curve was linear from 1-2 to 100-200ng of avidin/ml. Cross-reaction of ovalbumin was less than 0.015%. Saturation of biotin-binding sites of avidin with an excess of biotin decreased radioimmunoassay values by about 15%. Recovery studies indicated that avidin can be assayed from all chicken tissues studied with radioimmunoassay, whereas the [14C]biotin/bentonite method gave poor recoveries for avidin in the liver and kidney. Radioimmunoassay and the [14C]biotin/bentonite method gave similar concentrations for oviduct avidin.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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