Oxaloacetic Acid

 

Reaction 1: Synthesis of Citric Acid

Acetyl CoA and oxaloacetic acid condense to form citric acid. The acetyl group CH3COO is transferred from CoA to oxaloacetic acid at the ketone carbon, which is then changed to an alcohol. The net effect is to join a 2 carbon piece with a 4 carbon piece to make citric acid which is 6 carbons. This is just called the synthesis of citric acid.

This reaction is catalyzed by citric acid synthetase.

 Citric Acid

Color Codes
C

H

N

O

P

S

Cl

F

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 Acetyl group is added
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