BCCB2002 Lecture Notes - Lecture 4: Whey Protein, Protein Catabolism, Tryptophan
Document Summary
Contributions to and uses of the amino acid pool (mixture of amino acids in the cell, both derived from protein degradation and dietary proteins, which are available for metabolism and synthesis): supplied by protein catabolism (metabolism) Supplied more by endogenous protein degradation than dietary sources (exogenous) If not needed for syntheses, can include oxidising amino acids as an energy substrate, which removes the amino group as it can"t be. Converting amino acids to either another amino acid or another metabolised nitrogen-containing compound e. g. to creatinine: used by protein anabolism (synthesis) Rate - 4g protein/kg/day for adults, 12g/kg/day for newborn and. Dietary protein and endogenous protein degradation including exogenous and endogenous proteins digested in the intestine: dietary (exogenous) Can be converted into nitrogen-containing compounds other than amino acids. Proteins from secretions including mucus (mucin glycoprotein: a single food source doesn"t contain just one single protein.
