Réaction de la glycolyse Flashcards

1
Q

1er étape (début stage 1)

A

Glucose —- Glucose-6-phosphate (on ajoute un phosphate)
- 1 sens
Enzyme: Hexokinase

ATP devient ADP (on utilise de l’énergie)

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2
Q

2e étape

A

Glucose-6-Phosphate —- Fructose-6-Phosphate
(on coupe le G6P pour le mettre plus symétrique)
(la forme chimique est la même mais on change la forme)
-2 sens
Enzyme: Phosphoglucose isomérase

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3
Q

3e étape

A

Fructose-6-Phosphate —- Fructose 1,6-bisphosphate
(on ajoute un phosphate sur le carbone 1)
-1 sens

Enzyme: Phospho-fructokinase

ATP devient ADP (on utilise de l’énergie)

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4
Q

4 étape (transition vers stage 2)

A

Fructose 1,6-bisphosphate —- Glyceraldehyde 3-phosphate
(il va etre couper en 2)
Ou Fructose 1,6-bisphosphate —- Dihydroxyacetone phosphate

Enzyme: Aldolase

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5
Q

5 étape (intermédiaire)

A

Dihydroxyacetone phosphate —- Glyceraldehyde 3-Phosphate
-2 sens

Enzyme: Triose phosphate isomerase

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6
Q

6 étape (transition vers stage 3)

A

Glyceraldehyde 3-Phosphate —- 1,3-Bisphosphoglycerate
(on va ajouter un phosphate)
-2 sens

Enzyme: Glyceraldehyde 3-Phosphate dehydrogenase

Le NAD+ devient NADH

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7
Q

7 étape

A

1,3-Bisphosphoglycerate —- 3-Phosphoglycerate
- 2 sens

Enzyme: Phosphoglycerate kinase

ADP devient ATP (on créer de l’énergie)

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8
Q

8 étape

A

3-Phosphoglycerate —- 2-Phosphoglycerate
(on déplace le phosphate pour que tous les - sois proches)
-2 sens

Enzyme: Phosphoglycerate mutase

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9
Q

9 étape

A

2-Phosphoglycerate —- Phosphoenolpyruvate
(on enleve 1 H2O)
-2 sens

Enzyme: Enolase

libère H2O

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10
Q

10 étape

A

Phosphoenolpyruvate —- Pyruvate
-1 sens

Enzyme: Pyruvate kinase

ADP devient ATP donc produit de l’E

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11
Q

quel est la caractéristique avec la 3 phase?

A

Elle se fait 2 x

Pour avoir 4atp, 2 pyruvate, 2NADH

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