The DRUGMATRIX assay that is being discussed in this prompt is specifically used for testing the progesterone radioligand binding. The ligand used is [3H] R-5020. This assay is assigned to a direct single protein target, indicating that it is a reliable method for detecting the target protein. The assay organism used in this experiment is Bos taurus, and it is an in vitro test type. The assay tissue chosen for the test is the uterus. The type description of the assay is binding, which suggests that the objective of this assay is to observe how the ligand and protein bind together. Does this molecule show effectiveness in this assay?