title: The effect of extrinsic factors on two distinctive rhodopsin-porphyropsin systems.
mesh_terms: D000818:Animals; D005399:Fishes / Q000502:physiology*; D008027:Light; D012168:Retinal Pigments / Q000502:physiology*; D012243:Rhodopsin / Q000502:physiology*; D013696:Temperature; D013974:Thyroxine / Q000494:pharmacology; D014337:Trout / Q000502:physiology
chemical_list: D012168:Retinal Pigments; C010507:porphyropsin; D012243:Rhodopsin; D013974:Thyroxine