title: The rhodopsin-porphyropsin system in freshwater fishes. 1. Effects of age and photic environment.
mesh_terms: D000367:Age Factors; D000375:Aging; D000818:Animals; D001880:Boranes / Q000494:pharmacology; D003623:Dark Adaptation; D003624:Darkness; D005399:Fishes / Q000378:metabolism*; D006898:Hydroxylamines / Q000494:pharmacology; D008027:Light; D010088:Oxidoreductases / Q000378:metabolism; D012160:Retina / Q000187:drug effects / Q000201:enzymology; D012168:Retinal Pigments / Q000378:metabolism*; D012621:Seasons; D013053:Spectrophotometry; D013974:Thyroxine / Q000494:pharmacology; D013997:Time Factors; D014801:Vitamin A / Q000378:metabolism
chemical_list: D001880:Boranes; D006898:Hydroxylamines; D012168:Retinal Pigments; D014801:Vitamin A; D010088:Oxidoreductases; D013974:Thyroxine