11. This condition may be a milder variation of glucose-galactose malabsorption. 12. It is a disaccharide formed from gluconic acid and galactose . 13. This enzyme participates in galactose metabolism and nucleotide sugars metabolism. 14. Galactitol is produced from galactose in a reaction catalyzed by aldose reductase. 15. Copper ion is required as a cofactor for galactose oxidase. 16. Some providers recommend the galactose challenge before 12 months, others after. 17. Its primary action is to produce lactose from glucose and UDP-galactose . 18. The common dietary monosaccharides galactose , glucose and fructose are all reducing sugars. 19. The enzyme does not cleave ?-linked galactose , as in lactose. 20. Other sugar constituents of FSH and LH include glucosamine, galactose and glucose.