[HTML][HTML] Incorporation of urea and ammonia nitrogen into ileal and fecal microbial proteins and plasma free amino acids in normal men and ileostomates
CC Metges, KJ Petzke, AE El-Khoury… - The American journal of …, 1999 - Elsevier
Background The importance of urea nitrogen reutilization in the amino acid economy of the
host remains to be clarified. Objective The objective was to explore the transfer of 15 N from
orally administered [15 N 2] urea or 15 NH 4 Cl to plasma free and intestinal microbial amino
acids. Design Six men received an l-amino acid diet (167 mg N· kg− 1· d− 1; 186 kJ· kg− 1·
d− 1) for 11 d each on 2 different occasions. For the last 6 d they ingested [15 N 2] urea or, in
random order, 15 NH 4 Cl (3.45 mg 15 N· kg− 1· d− 1). On day 10, a 24-h tracer protocol (12 …
host remains to be clarified. Objective The objective was to explore the transfer of 15 N from
orally administered [15 N 2] urea or 15 NH 4 Cl to plasma free and intestinal microbial amino
acids. Design Six men received an l-amino acid diet (167 mg N· kg− 1· d− 1; 186 kJ· kg− 1·
d− 1) for 11 d each on 2 different occasions. For the last 6 d they ingested [15 N 2] urea or, in
random order, 15 NH 4 Cl (3.45 mg 15 N· kg− 1· d− 1). On day 10, a 24-h tracer protocol (12 …