食品科学
化学
生物化学
人体营养
乳脂
食物链
长链
生物
高分子科学
古生物学
亚麻籽油
作者
Yuanyuan Yan,Zhen Wang,Xingguo Wang,Yue Wang,Jingying Xiang,Kumar S.D. Kothapalli,J. Thomas Brenna
标识
DOI:10.1016/j.jff.2016.12.024
摘要
Abstract Branched chain fatty acids (BCFA) are components of common food fats but little is known about their positional distribution on triacylglycerols (TAG). Human milk fat, mature milk of cows and goats, and several fish oil products available in China were evaluated for BCFA content in the sn-2 position. Compared to the sn-1/sn-3 (α) positions, BCFA are enriched in sn-2 (β) position of human milk (68% of BCFA), but randomly distributed among the sn-2 and sn-1/sn-3 positions of cow and goat milk. Fish oil TAG sn-2 BCFA were consistently depleted compared to the sn-1/sn-3 positions (5.2–11.9% of BCFA). Human intestinal epithelial cells were incubated with human milk sn-2 MAG, or fatty acids liberated from human milk sn-2 MAG. Cells incorporated more BCFA as sn-2 MAG than as FFA. The stereochemical positioning of BCFA in human milk fat may be unique compared to other BCFA sources, and mediate selective absorption of BCFA.
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