Enables UDP-glucose 4-epimerase activity. Acts upstream of or within galactose metabolic process. Predicted to be active in cytosol. Is expressed in several structures, including alimentary system; nervous system; respiratory system; sensory organ; and skeleton. Human ortholog(s) of this gene implicated in galactose epimerase deficiency. Orthologous to human GALE (UDP-galactose-4-epimerase). [provided by Alliance of Genome Resources, Apr 2022]