title: The molecules of visual excitation.
mesh_terms: D015106:3',5'-Cyclic-GMP Phosphodiesterases / Q000502:physiology; D000818:Animals; D006152:Cyclic GMP / Q000502:physiology; D019204:GTP-Binding Proteins / Q000502:physiology*; D006160:Guanosine Triphosphate / Q000502:physiology; D006801:Humans; D008565:Membrane Proteins / Q000502:physiology*; D010786:Photoreceptor Cells / Q000502:physiology*; D012168:Retinal Pigments / Q000502:physiology*; D012243:Rhodopsin / Q000502:physiology*; D012964:Sodium / Q000502:physiology; D015293:Transducin; D014785:Vision, Ocular / Q000502:physiology*
chemical_list: D008565:Membrane Proteins; D012168:Retinal Pigments; D006160:Guanosine Triphosphate; D012243:Rhodopsin; D012964:Sodium; D015106:3',5'-Cyclic-GMP Phosphodiesterases; D019204:GTP-Binding Proteins; D015293:Transducin; D006152:Cyclic GMP