Carbohydrates in milk

Reineccius, G. A., Kavanagh, T. E. and Keeney, R G. 1970. Identification and quantitation of free neutral carbohydrates in milk products by gas-liquid chromatography and mass spectrometry. J. Dairy Sci. 53, 1018-1022. 

Many carbohydrates contain cyclic acetals or hemiacetals. Examples include glucose, the most common simple sugar, and lactose, the principal carbohydrate in milk. 

Newburg, D.S., and Nenbauer, S.H. 1995. Carbohydrate in milks analysis, quantities, and significance. In Handbook of Milk Composition, ed. R.G. Jensen, pp. 273-349. San Diego, CA Academic Press. 

One common disaccharide is sucrose, also known as table sugar because sucrose is used mainly as a sweetener. Sucrose is formed by the linking of glucose and fructose. Another common disaccharide is lactose, the most important carbohydrate in milk. It is often called milk sugar. Lactose is formed when glucose and galactose bond. 

Newburg DS, Neubauer SH. Carbohydrates in milk. In Jensen RG, Thompson MP, eds. Handbook of Milk Composition, San Diego Academic Press, 1995 273-349. 

Lactose is sometimes referred to as milk sugar because it is the principal carbohydrate in milk. The lactose structure follows. Is this a monosaccharide, disaccharide, or polysaccharide Explain. 

Galactose is a simple sugar formed when lactose, a carbohydrate in milk, is hydrolyzed. Individuals with galactosemia, a rare inherited disorder, lack an enzyme needed to metabolize galactose, and must avoid cow s milk and all products derived from cow s milk. Galactose is a stereoisomer of glucose (Problem 4.63). 

The enzyme lactase binds the carbohydrate lactose (C12H22O11) in its active site in Step [1]. Lactose then reacts with water to break a bond and form two simpler sugars, galactose and glucose, in Step [2]. This process is the first step in digesting lactose, the principal carbohydrate in milk. 

Also see MILK AND MILK PRODUCTS, Section headed "Carbohydrates in Milk" and SUGAR.)... 

Also see CARBOHYDRATE ], and MILK AND MILK PRODUCTS, section headed "Carbohydrates in Milk.")... 

Nutrients of Milk Carbohydrates in Milk Milk Fat Protein in Milk Minerals in Milk Vitamins in Milk... 

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