The Citric Acid Cycl3

The Citric Acid Cycl3 - Reaction 1: Citrate Synthase The...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
The Citric Acid Cycle The Reactions of the Citric Acid Cycle We are now ready to begin going through the reactions of the citric acid cycle. The cycle begins with the reaction between acetyl-CoA and the four-carbon oxaloacetate to form six-carbon citric acid. Through the next steps of the cycle, two of the six carbons of the citric acid leave as carbon dioxide to ultimately yield the four carbon product, oxaloacetate, which is used again in the first step of the next cycle. During the eight reactions that take place, for every molecule of acetyl- CoA the cycle produces three NADH and one flavin adenine dinucleotide (FAD/FADH2), along with one molecule of ATP. Figure %: The Citric Acid Cycle (Krebs Cycle). Note : Students taking the AP test generally do not need to more about the specifics of the citric acid cycle than what is contained in the above figure and paragraph.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Reaction 1: Citrate Synthase The first reaction of the citric acid cycle is catalyzed by the enzyme citrate synthase. In this step, oxaloacetate is joined with acetyl-CoA to form citric acid. Once the two molecules are joined, a water molecule attacks the acetyl leading to the release of coenzyme A from the complex. Figure %: Reaction 1. Reaction 2: Acontinase The next reaction of the citric acid cycle is catalyzed by the enzyme acontinase. In this reaction, a water molecule is removed from the citric acid and then put back on in another location. The overall effect of this conversion is that the OH group is moved from the 3' to the 4' position on the molecule. This transformation yields the molecule isocitrate. Figure %: Reaction 2....
View Full Document

Page1 / 2

The Citric Acid Cycl3 - Reaction 1: Citrate Synthase The...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online