Description_x000D_ Packaging_x000D_ 5, 25 mg in glass bottle_x000D_ Biochem/physiol Actions_x000D_ TPSF is a noncompetitive, potent inhibitor of estrogen receptor α, that does not compete with estrogen for binding to Erα. The compound has low toxicity and selectively targets E2-ERα-dependent cell growth. TPSF is effective in cells that become tamoxifen-resistant. It appears that down-regulation of ERα by TPSF is at list partially dependent to enhancement of proteasome-dependent degradation of ERα._x000D_ Features and Benefits_x000D_ This compound is featured on the Nuclear Receptors (Steroids) page of the Handbook of Receptor Classification and Signal Transduction. To browse other handbook pages, click here.