The effect of age on the net requirements for nitrogen, lysine and tryptophan by the well-fed rat.
D000375:Aging; D000818:Animals; D001669:Biochemical Phenomena; D008239:Lysine / Q000378:metabolism*; D009584:Nitrogen / Q000378:metabolism*; D011687:Purines / Q000494:pharmacology*; D051381:Rats; D014364:Tryptophan / Q000378:metabolism*
D011687:Purines; D014364:Tryptophan; D008239:Lysine; D009584:Nitrogen; C030985:purine
AGING/effects; LYSINE/metabolism; NITROGEN/metabolism; PURINES/effects; TRYPTOPHAN/metabolism