title: Rival transmitter in visual transduction.
mesh_terms: D000818:Animals; D002118:Calcium / Q000502:physiology; D006152:Cyclic GMP / Q000502:physiology; D006801:Humans; D012160:Retina / Q000502:physiology*; D014785:Vision, Ocular
chemical_list: D006152:Cyclic GMP; D002118:Calcium