title: Cell-surface receptors: puzzles and paradigms.
mesh_terms: D000818:Animals; D002462:Cell Membrane / Q000378:metabolism*; D004705:Endocytosis; D005796:Genes; D006801:Humans; D011956:Receptors, Cell Surface / Q000235:genetics / Q000378:metabolism*
chemical_list: D011956:Receptors, Cell Surface