Abstract

SHBG was highly purified by a 4-step method. Molecular weight, isoelectric point and DHT-binding were determined. Antibodies were generated and the well known transferrin crossreactivity was eliminated by affinity chromatography. SHBG as standard was not suitable for the RIA because of insufficient stability and was replaced by pregnancy serum. The tracer had to be chromatographed before each use. SHBG levels measured with this RIA are in the same range as has been reported in literature.

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