Journal of Pharmaceutical and Biomedical Analysis 1992-Jun
Determination of thevetin B in serum by fluorescence polarization immunoassay.
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Thevetin B, a cardiac glycoside of Thevetia neriifolia Juss. seeds, was determined in serum by fluorescence polarization immunoassay. Anti-digitoxin antibody was used, thevetin B genin being structurally identical to digitoxigenin. Cross-reactivity of 94% was found by this method, for concentrations from 5 to 80 ng ml-1.