title: The effect of light on the development of a diurnal rhythm in serotonin content and on the development of hydroxyindole-o-methyl transferase activity in the rat pineal gland.
mesh_terms: D000818:Animals; D002940:Circadian Rhythm; D003624:Darkness; D007211:Indoles; D008027:Light; D008780:Methyltransferases / Q000378:metabolism*; D010870:Pineal Gland / Q000201:enzymology / Q000378:metabolism*; D051381:Rats; D012701:Serotonin / Q000378:metabolism*
chemical_list: D007211:Indoles; D012701:Serotonin; D008780:Methyltransferases