Metabolic pathway of galactose

Deficiency of any of the enzymes (in blue) may result in galactosemia. Galactose-1-phosphate is elevated if GALT or epimerase activity is absent or impaired. The red "X" indicates the block/defective enzyme.

GALT: galactose-1-phosphate uridyl transferase; UDP: uridine diphosphate.

Graphic 50614 Version 3.0