In 1906, Hopkins and Willcox reported that tryptophan was essential for animals nutrition. Since then, the effect of tryptophan deficiency upon animal nutrition has been discussed by many authors. Recently the interrelation between trypto phan and niacin metabolism was demonstrated. On the other hand, Kotake and his collaborators studied tryptophan metabolism, being especially interested in kyn...

Although the differential flow of metabolites through alternate pathways of intermediary metabolism is thought to be an important functional cause of life-history trade-offs, this phenomenon remains understudied. Using a radiolabeled amino acid, we quantified genetic differences in in vivo amino acid metabolism between morphs of the wing-polymorphic cricket Gryllus firmus that trade off early-a...

2 Disease list and descriptions: A 15 2.1 Amino acid (AA) metabolism (aromatic) (Albinism, Alkaptonuria, Tyrosinemia, Waardenburg syndrome) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2.1.1 Albinism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2.1.2 Alkaptonuria . . . . . . . . . . . . . . . . . . ....

Sheikh K, Camejo G, Lanne B, Halvarsson T, Landergren MR, Oakes ND. Beyond lipids, pharmacological PPAR activation has important effects on amino acid metabolism as studied in the rat. Am J Physiol Endocrinol Metab 292: E1157–E1165, 2007. First published December 12, 2006; doi:10.1152/ajpendo.00254.2006.—PPAR agonists have been characterized largely in terms of their effects on lipids and gluco...