Assay Method Information

Assay Name:  Receptor Binding Assay
Description:  Using cytosol from progesterone receptor-expressing insect cells (Hi5), competitive binding to the progesterone receptor was determined from the ability to displace 3H-progesterone as reference substance from the receptor. If a compound has an affinity corresponding to progesterone, this corresponds to a competition factor (CF) of 1. CF values greater than 1 are characterized by a lower affinity for the progesterone receptor, and CF values of less than 1 are characterized by higher affinity. The test was carried out as test above, with the following modifications: cytosol from androgen receptor-expressing insect cells (Hi5) was used, and the reference substance was 3H-testosterone.
Affinity data for this assay
 

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