Galactolysis

Galactolysis refers to the catabolism of galactose.
In the liver, galactose is converted through the Leloir pathway to glucose 6-phosphate in the following reactions:
 galacto- uridyl phosphogluco-
 kinase transferase mutase
 gal --------> gal 1 P ------------------> glc 1 P -----------> glc 6 P
 / v
 UDP-glc UDP-gal
 \___________/
 epimerase
Metabolic disorders.
There are 3 types of galactosemia or galactose deficiencies: