Question: Which is a description of an estrogen receptor assay? Need Assignment Help? Group of answer choices Tests the presence of a protein antigen in serum of liver and testicular cancer patients Tests the concentration of hormone receptor sites in cells of breast cancer patients Tests for a portion of human chorionic gonadotropin in serum of patients Tests for the presence of carcinoembryonic antigen in the blood Tests for the amount of carcinogenic hormones in the bloodstream of cancer patients