Protein Metabolism

Question 1

what are 3 sources of free amino acids?

Answer 1

1. dietary protein after digestion & absorption (20g/day)
2. digestion of endogenous proteins (70g/day)
3. intracellular protein degradation (230g/day)

Question 2

what are the metabolic fates of amino acids?

Answer 2

• protein synthesis
• precursors for non-protein nitrogenous compounds (NPN)
• catabolism for energy production