oxidation… not like burning a marshmallow. rather, stepwise release of energy
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Oxidation… not like burning a marshmallow. Rather, stepwise release of energy. Two primary forms of energy are: Nucleotide triphosphate (e.g. ATP, GTP) Reducing power (NADH, NADPH). Two ways to make them: Through glycolysis (cytosol) Oxidative phosphorylation (mitochondria). - PowerPoint PPT PresentationTRANSCRIPT
Two primary forms of energy are:
Nucleotide triphosphate (e.g. ATP, GTP)Reducing power (NADH, NADPH)
Two ways to make them:
Through glycolysis (cytosol)Oxidative phosphorylation (mitochondria)
The driving force for oxidative phosphorylation is the movement of ions (from last two lectures)
Gut or lysozome
Cytosol
Matrix
Pyruvate
Aceyl CoA
NADH, FADH2, GTP
First, the entire process then I’ll break it down into its parts.
Stage 2
Oxidation, but not Molecular O2
Some ATP butinefficient.
Understand but don’t memorize 10 rxns, panel 13-1
If fermentation does not occur (i.e. oxygen is present), pyruvate is used for oxidative phosphorylation
… in the mitochondrion.
Hans Adolf Krebs Fritz Albert Lipmann
The Nobel Prize in Physiology or Medicine 1953
"for his discovery of the citric acid cycle"
"for his discovery of co-enzyme A and its importance for intermediary metabolism"
Interested? Check out “How we know”
Back to the mitochondrion…
Porin, 5kDa exclusion
Impermeable, cristae,Large surface, electrontransport
~ same as cytosol
Negative meansgood electrondonor pair
Positive voltagemeans good electron acceptor
Chemistry 11 refresher:Reduced means receivedAn electron
Oxidized means lost an electron
Oxygen readily receives electrons
“things are oxidizedby oxygen”
~ energy of ADP +P {