摘要
Five female transgenic mice were produced by microinjection using a construct made up of a 7.3-kb-5′ flanking region and a 2.0-kb coding region of human a-lactalbumin, as well as a 227-bp 3′-flanking region from bovine growth hormone gene. A founder female ex-pressed human a-lactalbumin as much as 0.3 g per liter of its milk, approximately a 3-fold in-crease in the total a-lactalbumin concentration of the transgenic mouse milk. Compared with the normal mice, the expression profile of the ha-Lac transgene in the transgenics is different during the lactation, showing low level in the first 3 days and becoming increased from day 4, then gradually reaching and stabilizing at the highest level from day 13. In addition, the milk yielding volume in the transgenics tended to be higher than in normal mice, suggesting higher concen-trations of a-lactalbumin might boost more milk output.
Five female transgenic mice were produced by microinjection using a construct made up of a 7.3-kb-5′ flanking region and a 2.0-kb coding region of human a-lactalbumin, as well as a 227-bp 3′-flanking region from bovine growth hormone gene. A founder female ex-pressed human a-lactalbumin as much as 0.3 g per liter of its milk, approximately a 3-fold in-crease in the total a-lactalbumin concentration of the transgenic mouse milk. Compared with the normal mice, the expression profile of the ha-Lac transgene in the transgenics is different during the lactation, showing low level in the first 3 days and becoming increased from day 4, then gradually reaching and stabilizing at the highest level from day 13. In addition, the milk yielding volume in the transgenics tended to be higher than in normal mice, suggesting higher concen-trations of a-lactalbumin might boost more milk output.
