And lactose is a disaccharide that is found in milk. So lactose is disaccharide that is found in milk and which consists of two individual monosaccharides. The first monosaccharide is a galactose, and more specifically, it's the beta deglactose, while the second molecule, the second monosaccharide, is the alpha deglucose. So let's take a look at the structure of this lactose molecule. So notice the linkage, just like in this particular case, is also between the first carbon of the first sugar molecule and the fourth carbon of the second sugar molecule. But notice that our bond on this anomaly, carbon of the first sugar, is or has the beta arrangement.