The principal application of this assay product is in the screening of test samples to quantify functional activities, either agonist or antagonist, that they may exert against the rat estrogen receptor. This is an all-inclusive assay system that includes, in addition to rERβ Reporter Cells, two optimized media for use during cell culture and in diluting the user’s test samples, the reference agonist 17β-estradiol, Luciferase Detection Reagent, a cell culture-ready assay plate, and a detailed protocol. [INDIGO Catalog Nos. R00411, R00411-32]