4402 D-Galactose D-Galactose is an aldohexose that occurs naturally in the D-form in lactose, cerebrosides, gangliosides, and mucoproteins. D-Galactose is an energy-providing nutrient and also a necessary basic substrate for the biosynthesis of many macromolecules in the body. Metabolic pathways for D-Galactose are important not only for the provision of these pathways but also for the prevention of D-Galactose and D-Galactose metabolite accumulation. The main source of D-Galactose is lactose in the milk of mammals, but it can also be found in some fruits and vegetables. Utilization of D-Galactose in all living cells is initiated by the phosphorylation of the hexose by the enzyme galactokinase (E.C. 2.7.1.6) (GALK) to form D-Galactose-1-phosphate. In the presence of D-Galactose-1-phosphate uridyltransferase (E.C. 2.7.7.12) (GALT) D-Galactose-1-phosphate is exchanged with glucose-1-phosphate in UDP-glucose to form UDP-galactose. Glucose-1-phosphate will then enter the glycolytic pathway for energy production. Deficiency of the enzyme GALT in galactosemic patients leads to the accumulation of D-Galactose-1-phosphate. Classic galactosemia-a term that denotes the presence of D-Galactose in the blood is the rare inborn error of D-Galactose metabolism, diagnosed by the deficiency of the second enzyme of the D-Galactose assimilation pathway, GALT, which, in turn, is caused by mutations at the GALT gene. (A3437, A3438, A3439). 59-23-4 439357 C6H12O6 180.16 White powder. 170°C 683.0 mg/mL No indication of carcinogenicity to humans (not listed by IARC). This is an endogenously produced metabolite found in the human body. It is used in metabolic reactions, catabolic reactions or waste generation. 2014-08-29T06:31:09Z 2026-05-14T19:12:16Z Hexose C00984 28061 GALACTOSE DB11735 GLA true OC[C@H]1O[C@H](O)[C@H](O)[C@@H](O)[C@H]1O C6H12O6 InChI=1S/C6H12O6/c7-1-2-3(8)4(9)5(10)6(11)12-2/h2-11H,1H2/t2-,3+,4+,5-,6+/m1/s1 WQZGKKKJIJFFOK-PHYPRBDBSA-N 180.1559 180.063388116 Endogenous Solid -3.6 HMDB00143 CHEMBL1233058 388480 Avigad, Gad. Synthesis of D-galactose-6-t and D-galactosides-6-t. Carbohydrate Research (1967), 3(4), 430-4. CHEM003308 (2R,3S,4S,5R)-2,3,4,5,6-pentahydroxyhexanal 110.38000000000001 35.9234 16.129783718715995 1 6 5 11.298101552080594 -2.9810792051782764 0 1 -2.57 0.64 7.82e+02 g/l