Major Catabolic Pathways

BIOCHEMISTRY 3(2+1)
Lesson 16 : Metabolic Pathways

Major Catabolic Pathways

  1. begins with extracellular digestion of polymers (exogenous)
  2. amylase in mouth and intestine work on starch
  3. protein digestion starts in stomach and finished via pancreatic proteases and intestinal peptidases
  4. lipid digestion - triacylglycerols hydrolyzed to fatty acids by phospholipases
  5. absorption occurs in intestine ---> blood ---> body
  6. can also have endogenous sources, such as glycogen and triacylglycerols
  7. catabolism yields 3 possible compounds:

    1. acetyl CoA
    2. nucleoside triphosphates
    3. reduced coenzymes

  8. starts with glycolysis (glucose catabolism), citric acid cycle, polysaccharide mobilization, oxidative phosphorylation
  9. nucleotides are metabolized for excretion, not energy production

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Last modified: Friday, 20 January 2012, 8:19 AM