title: Diurnal variation of 5-hydroxytryptamine content in the pineal organ of the yellow eel (Anguilla anguilla (L.)).
mesh_terms: D000811:Anguilla / Q000378:metabolism*; D000818:Animals; D002940:Circadian Rhythm; D010870:Pineal Gland / Q000378:metabolism*; D012701:Serotonin / Q000097:blood / Q000378:metabolism*
chemical_list: D012701:Serotonin