The mouse-killing behaviour of the rat, kept on a long-lasting diet devoid of tryptophan.
D000374:Aggression / Q000502:physiology*; D000818:Animals; D004032:Diet; D006801:Humans; D008297:Male; D051381:Rats; D011919:Rats, Inbred Strains; D014364:Tryptophan / Q000172:deficiency*
D014364:Tryptophan