Formation of whey protein/κ-casein complexes in heated milk: Preferential reaction of whey protein with κ-casein in the casein micelles
- 作者：Laurence Donato ; Fanny Guyomarc’ ; h ; Sylvie Amiot ; Douglas G. Dalgleish
- 关键词：Casein micelles ; Heated milk ; Whey protein– ; casein interactions ; κ ; -casein
- 刊名：International Dairy Journal
- 出版年：2007
- 期刊代码：59_09586946
- 类别：abs
- 出版时间：October 2007
- 卷：17
- 期：10
- 页码：1161-1167
- 文件大小：257 K
摘要
Studies of the formation of soluble κ-casein/whey protein (WP) complexes in heated (90 °C 10 min−1) milk and related mixtures of proteins have been made. The use of milk samples containing different genetic variants, and having different compositions, allowed the effects of changing the natural protein balance on the formation of particles to be investigated. In addition, studies were made of the effects of addition of WP or of purified κ-casein to the milk samples. The addition of WP caused an increase in the amount and the size of the complexes, but addition of κ-casein to the milk had little or no effect on the complex formation, nor did it seem that the added κ-casein could react with the WP in the milk. Conversely, in systems where the casein micelles were absent, the purified κ-casein reacted well with WP, suggesting that in milk heated at its normal pH the WP react preferentially with the κ-casein on the casein micelles.