AVIDIN TRAPS BIOTIN DIFFUSING OUT OF CHICKEN EGG-YOLK
AVIDIN TRAPS BIOTIN DIFFUSING OUT OF CHICKEN EGG-YOLK
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DOI：
10.1016/0305-0491(89)90373-8
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发表时间：
1989-01-01
影响因子：
2.2
通讯作者：
WHITE, HB
中科院分区：
文献类型：
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作者：
BUSH, L;WHITE, HB
1.新产蛋黄和蛋白中生物素和生物素结合蛋白的不均匀分布为生物素随时间的重新分配提供了可能，这可能会影响鸡蛋的质量、生物素的利用率和孵化率。2.在储存长达23天的鸡蛋中，亲和素结合的生物素在蛋壳和蛋黄旁的蛋白中被测量。3.在同一卵黄的中心和外围检测到生物素结合蛋白(BBP-I和BBP-II)。4.贮藏11天后，蛋黄中的生物素开始在靠近蛋黄的蛋白中大量积累。5.这种转移归因于卵黄膜的变化，允许生物素扩散出蛋黄，而不是BBP-I或BBP-II。6.这一现象的动态表明，除其抗菌作用外，亲和素可能还参与了鸡胚胎对生物素的利用。
1. The unequal distribution of biotin and biotin-binding proteins between the yolk and albumen of freshly laid chicken eggs provides the potential for time-dependent redistribution of biotin that could affect egg quality, biotin availability, and hatchability. 2. Avidin-bound biotin was measured in albumen next to the shell and next to the yolk in eggs stored up to 23 days. 3. Biotin bound to biotin-binding proteins (BBP-I and BBP-II) was measured at the center and periphery of yolk from the same eggs. 4. After 11 days of storage, significant amounts of biotin from the yolk began to accumulate in the albumen adjacent to the yolk. 5. This transfer is attributed to a change in the vitelline membrane that permits diffusion of biotin, not BBP-I or BBP-II, out of the yolk. 6. The dynamics of this phenomenon suggest that in addition to its antimicrobial role, avidin may be involved in the utilization of biotin by the chick embryo.