title: The role of peptides and amino acids as neurotransmitters.
mesh_terms: D000596:Amino Acids / Q000502:physiology*; D000818:Animals; D003226:Congresses as Topic; D006801:Humans; D018377:Neurotransmitter Agents / Q000502:physiology*; D010455:Peptides / Q000502:physiology*
chemical_list: D000596:Amino Acids; D018377:Neurotransmitter Agents; D010455:Peptides