Brain serotonin content: physiological dependence on plasma tryptophan levels.
D000818:Animals; D001921:Brain / Q000378:metabolism*; D002940:Circadian Rhythm; D008297:Male; D051381:Rats; D012701:Serotonin / Q000032:analysis / Q000096:biosynthesis / Q000378:metabolism*; D013237:Stereoisomerism; D014364:Tryptophan / Q000032:analysis / Q000097:blood* / Q000378:metabolism / Q000502:physiology*
D012701:Serotonin; D014364:Tryptophan