TY - CHAP M1 - Book, Section TI - Urea Cycle Disorders A1 - Yudkoff, Marc A1 - Summar, Marshall L. A1 - Häberle, Johannes A2 - Sarafoglou, Kyriakie A2 - Hoffmann, Georg F. A2 - Roth, Karl S. Y1 - 2017 N1 - T2 - Pediatric Endocrinology and Inborn Errors of Metabolism, 2e AB - Essentially all animal cells form ammonia in the course of the metabolism of amino acids and the adenine nucleotides. Mammals prevent the accumulation of ammonia, which is neurotoxic in high concentration, by converting this compound to urea via the urea cycle (Figure 13-1), which was “discovered” in 1932 by Krebs and Henseleit.1 Ureagenesis is an extremely efficient mechanism for the disposal of waste nitrogen. A healthy adult who daily consumes 50 to 100 grams of protein will excrete 10 to 20 grams of nitrogen (N) as urea, or 80% to 90% of total urinary N. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/19 UR - accesspediatrics.mhmedical.com/content.aspx?aid=1140316009 ER -