title: Principles of receptor identification.
mesh_terms: D000818:Animals; D006728:Hormones / Q000378:metabolism*; D006801:Humans; D008024:Ligands / Q000378:metabolism; D011869:Radioligand Assay; D011956:Receptors, Cell Surface / Q000378:metabolism*
chemical_list: D006728:Hormones; D008024:Ligands; D011956:Receptors, Cell Surface