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We have developed a rapid automated immunoassay, using the BIACORE surface plasmon resonance (SPR) biosensor, to measure progesterone in bovine milk. The assay was designed as an inhibition assay with progesterone covalently immobilised to the carboxymethyl dextran matrix of a CM5 sensor chip. A fixed amount of monoclonal anti-progesterone antibody 39C5H7 was mixed 9:1 with the sample and the amount...
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