free sugar lactose 0 342.11621 342.297 CHEBI:22760 1-beta-D-Galactopyranosyl-4-D-glucopyranose pubmed:21403918 pubmed:20503067 pubmed:2432147 GUBGYTABKSRVRQ-QKKXKWKRSA-N pubmed:20873837 pubmed:7574700 C12H22O11 pubmed:6194884 CHEBI:613009 pubmed:18300214 CHEBI:27968 pubmed:1292745 Laktose pubmed:19846069 lactose CHEBI:28577 kegg.drug:D00046 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 A glycosylglucose disaccharide, found most notably in milk, that consists of <small>D</small>-galactose and <small>D</small>-glucose fragments bonded through a β-1→4 glycosidic linkage. The glucose fragment can be in either the α- or β-pyranose form, whereas the galactose fragment can only have the β-pyranose form. CHEBI:25005 pubmed:19913595 pubmed:17329833 beta-D-Galp-(1->4)-D-Glcp 4-O-beta-D-galactopyranosyl-D-glucose kegg.glycan:G10504 lactobiose pubmed:20961532 pubmed:20094999 CHEBI:27755 pubmed:28807538 CHEBI:22460 4-(beta-D-galactosido)-D-glucose glygen:G74621DY OC[C@H]1O[C@@H](O[C@H]2[C@H](O)[C@@H](O)C(O)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@H]1O D-lactose Laktobiose pubmed:19053747 milk sugar beta-D-galactopyranosyl-(1->4)-D-glucopyranose WURCS=2.0/2,2,1/[a2122h-1x_1-5][a2112h-1b_1-5]/1-2/a4-b1 (Gal)1 (Glc)1 cas:63-42-3 glytoucan:G74621DY pubmed:28690131 pubmed:2456994 Galbeta1-4Glc Milk sugar CHEBI:17716 pubmed:20699559 kegg.compound:C00243 gmelin:882872 beta-D-Gal-(1->4)-D-Glc beta-D-galactopyranosyl-(1->4)-D-glucopyranose CHEBI:10380 CHEBI:14497 (+)-lactose CHEBI:10296 Milchzucker chebi_ontology beta-Gal1,4-Glc reaxys:1292745 Lac knapsack:C00001136 disaccharide