That compound is converted to dihydroxyacetone phosphate by the enzyme triose phosphate isomerase, which is a catalytically perfect enzyme; its rate is so fast that the reaction can be assumed to be in equilibrium.
22.
"' Triose-phosphate isomerase "'( TPI or TIM ) is an enzyme ( ) that catalyzes the reversible interconversion of the triose phosphate isomers dihydroxyacetone phosphate and D-glyceraldehyde 3-phosphate.
23.
"' Triose-phosphate isomerase "'( TPI or TIM ) is an enzyme ( ) that catalyzes the reversible interconversion of the triose phosphate isomers dihydroxyacetone phosphate and D-glyceraldehyde 3-phosphate.
24.
These enzymes were formerly known as cellulase family B . The 3D structure of the enzymatic core of cellobiohydrolase II ( CBHII ) from the fungus " Trichoderma reesei " reveals an alpha-beta protein with a fold similar to the ubiquitous barrel topology first seen in triose phosphate isomerase.
25.
"' Fructose-bisphosphate aldolase "'( ), often just "'aldolase "', is an enzyme catalyzing a reversible reaction that splits the aldol, fructose 1, 6-bisphosphate, into the triose phosphates dihydroxyacetone phosphate ( DHAP ) and glyceraldehyde 3-phosphate ( G3P ).
26.
The other triose, the aldose H ( C = O ) ( CHOH ) 2 H ( glyceraldehyde ), has one chiral carbon the central one, number 2 which is bonded to groups " H, " OH, " C ( OH ) H 2, and " ( C = O ) H . Therefore, it exists as two stereoisomers whose molecules are mirror images of each other ( like a left and a right glove ).
27.
Schematic overview of fermentative and oxidative glucose metabolism of Saccharomyces cerevisiae . ( A ) upper part of glycolysis, which includes two sugar phosphorylation reactions . ( B ) fructose-1, 6-bisphosphate aldolase, splitting the C6-molecule into two triose phosphates ( C ) triosephosphate isomerase, interconverting DHAP and GAP . ( D ) glycerol pathway reducing DHAP to glycerol-3-phosphate ( G3P ) by G3P dehydrogenase, followed by dephosphorylation to glycerol by G3Pase . ( E ) The lower part of glycolysis converts GAP to pyruvate while generating 1 NADH and 2 ATP via a series of 5 enzymes . ( F ) Alcoholic fermentation; decarboxylation of pyruvate by pyruvate decarboxylase, followed by reduction of acetaldehyde to ethanol . ( G ) mitochondrial pyruvate-dehydrogenase converts pyruvate to acetyl-CoA, which enters the tricarboxylic acid cycle . ( H ) external mitochondrial NADH dehydrogenases . ( I ) mitochondrial G3P dehydrogenase.
