1 / 11

NAD+ reaction

NAD+ reaction. The Kreb Cycle. (named in 1930 after Hans Kreb) Aka citric acid cycle tricarboxylic acid cycle. Product of Glycolysis Pyruvate stores a significant amount of energy

sai
Download Presentation

NAD+ reaction

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. NAD+ reaction

  2. The Kreb Cycle (named in 1930 after Hans Kreb) Aka citric acid cycle tricarboxylic acid cycle

  3. Product of Glycolysis • Pyruvate stores a significant amount of energy • If oxygen is present, pyruvate enters the mitochondria where enzymes complete the oxidation (loss of e-) of organic fuel • Processes involved before the Kreb Cycle • Pyruvate’s carboxyl group is removed and given off as a molecule of CO2

  4. The remaining two carbon molecules are oxidized (lose e-) to form acetate • The electrons extracted transfer to NAD+ and store energy in the form of NADH • Side note: NAD + has been reduced here • Coenzyme A (contains sulfur) attaches to the acetyl group, which is very reactive, and produces acetyl coenzyme A (acetyl CoA)

  5. Processes involved during the Kreb Cycle • For each Acetyl CoA that enters the cycle: • Three molecules of NAD+ are reduced to NADH • So six total b/c there are two pyruvates originally that have been convereted into acetyl CoA • Electrons are transferred to FAD (flavin adenosine dinucleotide-derived from vitamin B) • This reduces FAD to FADH2 • Therefore a total of two molecules of FADH2

  6. One molecule of ATP is produced via substrate phosphorylation • Therefore two ATP total • Three molecules of CO2 • Therefore six total (four during the Kreb Cycle and two when pyruvate was converted to acetate) • Reduced enzymes (carrying a lot of chemical energy), NADH and FADH2, move to the last step of cellular respiration, the electron transport chain (ETC)

  7. kreb cycle animation • kreb cycle animation

More Related