title: Galactooligosaccharide and Sialyllactose Content in Commercial Lactose Powders from Goat and Cow Milk.
abstract: The most commonly used infant formulas contain lactose originating from cow milk. Goat milk has recently been claimed to be nutritionally more effective for infants than other milks. In baby foods, much emphasis is placed on the concentrations of intestinal microflora-promoting oligosaccharides, which are generally transferred into lactose from milk during crystallization process. Here we show that higher level of free sialic acid is present in goat lactose powder compared to cow lactose powder. Without proteinase K treatment, the amount of 3-sialyllactose and 6-sialyllactose were similar in goat and cow lactose powders. However, after proteolysis, 6-sialyllactose was present at higher levels in goat than in cow lactose powder. Galactooligosaccharides, a group of prebiotics, are present in milk in the form of glycoproteins. Galactooligosaccharide content was also higher in goat lactose powder than in cow lactose powder.
authors.affiliation: Division of Biological Science and Technology, College of Science and Technology, Yonsei University, Wonju 220-710, Korea.
authors.forename: Hyo-Hee
authors.initials: HH
authors.lastname: Kim
authors.affiliation: Ivenet Nutritional Science Institute, Seoul 138-050, Korea.
authors.forename: Sung-Seob
authors.initials: SS
authors.lastname: Yun
authors.affiliation: Department of Oriental Medical Food & Nutrition, Semyung University, Jecheon 390-711, Korea.
authors.forename: Chang-Hwan
authors.initials: CH
authors.lastname: Oh
authors.affiliation: Division of Biological Science and Technology, College of Science and Technology, Yonsei University, Wonju 220-710, Korea.
authors.forename: Sung-Sik
authors.initials: SS
authors.lastname: Yoon
keywords: cow milk; galactooligosaccharide; goat milk; sialyllactose