Saturday, March 19, 2011

Cellular Respiration: Pyruvate oxidation

During pyruvate oxidation, the two pyruvates are transported into the matrix of the mitochondria. A transport protein is required to allow for its passage through the inner membrane.

First, a low energy carboxyl group is removed as carbon dioxide.
*This is a decarboxylation reaction catalyzed by the enzyme: pyruvate decarboxylase.
Secondly, NAD+ oxidizes the 2 carbon compound forming NADH.
Thirdly, sulfur containing CoA attaches to the acetate component.

The acetyl-CoA is now ready for the Krebs Cycle!

Reactants: 2 pyruvate, 2NAD+, 2CoA
Products: 2 acetyl-CoA, 2NADH, 2H+, 2Carbon dioxide molecules
Location: Mitochondrial Matrix
Net ATP: none

This video also illustrates the electron transport chain discussed in the next blog as well!

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