Glycolysis Handout Input

Glycolysis Handout Input - Step 3 : Fructose 6-phosphate is...

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www.thinkwell.com info@thinkwell.com Copyright © 2000, Thinkwell Corp., All Rights Reserved. 031600bio091 Glycolysis: The Initial Steps: Energy Input ª In the process of glycolysis , glucose , a six-carbon molecule, is split into two pyruvates (three-carbon molecules). ª The first stage of glycolysis involves an energy investment of two ATP. ª When studying metabolic pathways, pay attention to the name of the enzyme and what the enzyme did. Glycolysis: The Energy Investment Step 1 : Glucose is phosphorylated by the enzyme hexokinase to form glucose 6- phosphate. Glucose gains energy by being phosphorylated at the expense of one ATP . Step 2 : Glucose 6-phosphate is converted into its isomer, fructose 6-phosphate, by an isomerase enzyme. By converting into its isomer, the molecule is further energized.
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Unformatted text preview: Step 3 : Fructose 6-phosphate is phosphorylated by the enzyme phosphofructokinase to form fructose 1,6-bisphosphate. This step adds even more energy to the molecule at the expense of one ATP. www.thinkwell.com info@thinkwell.com Copyright 2000, Thinkwell Corp., All Rights Reserved. 031600bio091 Step 4 : Fructose 1,6-bisphosphate is split into two molecules, dihydroxyacetone phosphate and glyceraldehyde phosphate. Step 5 : Dihydroxyacetone phosphate is converted into glyceraldehyde 3-phosphate. This reaction runs in both directions, but because the glyceraldehyde 3-phosphate is converted further in glycolysis, the equilibrium favors the formation of glyceraldehyde 3-phosphate. Glyceraldehyde 3-phosphate goes on to the next phase of glycolysis, the energy payoff phase....
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This note was uploaded on 04/16/2010 for the course BIS 103 taught by Professor Abel during the Spring '08 term at UC Davis.

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Glycolysis Handout Input - Step 3 : Fructose 6-phosphate is...

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