Amino Acid Pool and Nitrogen Balance
Start with the big picture
The pool is in continual exchange with body proteins and metabolic pathways. Amino acids can support protein synthesis and the production of nitrogen-containing compounds, while their carbon skeletons may contribute to energy metabolism. Because excess amino acids are not stored, their nitrogen is ultimately disposed of as urea. The lesson connects this process with nitrogen balance: the relationship between nitrogen intake and losses. It outlines conditions associated with positive, negative, or balanced nitrogen status, and contrasts the patterns described for kwashiorkor and marasmus. It also introduces ways nitrogen excretion and protein requirements may be assessed, providing a framework for understanding how diet and illness affect protein metabolism.
What you'll learn
- Identify the main sources and major fates of the amino acid pool.
- Describe transamination, oxidative deamination, and the role of the urea cycle.
- Define nitrogen balance and distinguish positive, negative, and equilibrium states.
- Compare the nitrogen-balance context of kwashiorkor and marasmus.
- Recognize approaches used to assess nitrogen excretion and protein requirements.
Continue your study
Work through the complete notes and reinforce the topic with the study tools available in the full lesson.
