Metabolism of Galactose and Fructose

Both of its component six-carbon sugars, glucose and galactose, then may be used for energy production. 

Galactose and glucose are converted to uridine nucleotides and ultimately inter- 

In the cell, galactose is converted to galactose 1-phosphate by galactokinase with ATP as the phosphate donor. 

Galactose 1-phosphate and UDP-glucose react to form UDP-galactose and glucose 1-phosphate, as catalyzed by galactose 1-phosphate uridyltransferase. 

UDP-galactose can be converted to UDP-glucose by uridine diphosphogalac-tose 4-epimerase. 

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