title: Chemical signalling systems: the rules of the game.
authors.affiliation: Hannah Research Institute, Ayr, U.K.
authors.forename: M
authors.initials: M
authors.lastname: Peaker
mesh_terms: D000818:Animals; D005075:Biological Evolution; D004702:Endocrine Glands / Q000502:physiology*; D006728:Hormones / Q000502:physiology*; D006801:Humans; D008954:Models, Biological; D015290:Second Messenger Systems / Q000502:physiology*
chemical_list: D006728:Hormones