Add time:09/25/2019         Source:sciencedirect.com

The preparation and antigenic properties of estriol 3-sulfate 16-glucuronide-bovine serum albumin (BSA) conjugate in which the hapten is linked to the carrier through an (O-carboxymethyl)oxime bridge at the C-6 position on the steroid nucleus, have been described. Coupling of 6-oxoestriol 3-sulfate 16-glucuronide acetate-methyl ester 6-(O-carboxymethyl)oxime with BSA by the activated ester method followed by removal of the protecting groups with alkali provided the desired conjugate. The antisera raised against the conjugate in rabbits were highly specific to the double conjugate, estriol 3-sulfate 16-glucuronide, discriminating from ring A or D monoconjugated and unconjugated estrogens. The specificity of antisera elicited has been discussed on the basis of stereochemistry of the hapten-[C-6]-BSA conjugate.

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