China's first genetically modified cloned cow's milk containing gastro-intestinal components

China's first genetically modified cloned cow, “Sweet Sweet”, successfully produced a calf at Xinhua Dairy Farm in Lutai Economic and Technological Development Zone, Tangshan, and became the first transgenic cow in China to enter the lactation phase. According to experts, the fucose transferase gene contained in "sweet" milk will have a certain effect on human stomach. In October 2002, researchers from the National Animal Husbandry Institute of China National Agricultural University and Chinese Academy of Agricultural Sciences obtained living tissue cells from the ears of a high-producing dairy cow. Transgenic technology was used to implant the fucosyltransferase gene for the treatment of human stomach diseases. Embryo. The cloned embryos are then transplanted into recipient cows in utero by embryo transfer techniques. On June 23, 2003, the transgenic cloned cow "sweet" was successfully born. Under the meticulous feeding of the keeper of Xinhua Dairy Farm in the Lutai Development Zone, “sweetness” developed normally. Earlier this year, "sweet" was pregnant by artificial insemination. Dairy farm breeders said that due to genetic factors, “sweet” has high yield characteristics. On the first day of milk production, more than 10 kilograms of milk was produced, which is twice as high as that of ordinary cows. If it reaches the peak of milk production, milk production can reach 10,000 kilograms per year. The "sweet" emulsion that enters the lactation phase contains a rock sugar carbohydrate antigen, which is the culprit responsible for the stomach disease - Helicobacter pylori. Therefore, this kind of genetically modified milk can be used as an oral medicine to control various kinds of stomach diseases. It has important medical value and economic and social value.

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