title: The regulation of day--night changes in hydroxyindole-O-methyltransferase activity in the pineal gland of steelhead trout (Salmo gairdneri).
mesh_terms: D000121:Acetylserotonin O-Methyltransferase / Q000378:metabolism*; D000818:Animals; D008027:Light; D008780:Methyltransferases / Q000378:metabolism*; D010507:Periodicity; D010870:Pineal Gland / Q000201:enzymology*; D012487:Salmonidae / Q000502:physiology*; D014337:Trout / Q000378:metabolism / Q000502:physiology*
chemical_list: D008780:Methyltransferases; D000121:Acetylserotonin O-Methyltransferase