lactose (+)-lactose (Gal)1 (Glc)1 1-beta-D-Galactopyranosyl-4-D-glucopyranose 342.116 342.29648 4-(beta-D-galactosido)-D-glucose 4-O-beta-D-galactopyranosyl-D-glucose A glycosylglucose disaccharide, found most notably in milk, that consists of D-galactose and D-glucose fragments bonded through a beta-1->4 glycosidic linkage. The glucose fragment can be in either the alpha- or beta-pyranose form, whereas the galactose fragment can only have the beta-pyranose form. Beilstein:1292745 C12H22O11 CAS:63-42-3 CHEBI:10296 CHEBI:10380 CHEBI:14497 CHEBI:17716 CHEBI:22460 CHEBI:22760 CHEBI:25005 CHEBI:27755 CHEBI:613009 D-lactose GUBGYTABKSRVRQ-QKKXKWKRSA-N Galbeta1-4Glc Gmelin:882872 InChI=1S/C12H22O11/c13-1-3-5(15)6(16)9(19)12(22-3)23-10-4(2-14)21-11(20)8(18)7(10)17/h3-20H,1-2H2/t3-,4-,5+,6+,7-,8-,9-,10-,11?,12+/m1/s1 KEGG:C00243 KEGG:D00046 KEGG:G10504 KNApSAcK:C00001136 Lac Laktobiose Laktose Milchzucker Milk sugar OC[C@H]1O[C@@H](O[C@@H]2[C@@H](CO)OC(O)[C@H](O)[C@H]2O)[C@H](O)[C@@H](O)[C@H]1O PMID:1292745 PMID:17329833 PMID:18300214 PMID:19053747 PMID:19846069 PMID:19913595 PMID:20094999 PMID:20503067 PMID:20699559 PMID:20873837 PMID:20961532 PMID:21403918 PMID:2432147 PMID:2456994 PMID:28690131 PMID:28807538 PMID:6194884 PMID:7574700 Reaxys:1292745 beta-D-Gal-(1->4)-D-Glc beta-D-Galp-(1->4)-D-Glcp beta-D-galactopyranosyl-(1->4)-D-glucopyranose beta-Gal1,4-Glc chebi_ontology lactobiose lactose milk sugar glycosylglucose carbohydrates and carbohydrate derivatives