Cattle Clone in China
The largest scale animal cloning research project
in China at present-somatic cell cattle cloning project, passed the authentication
by experts on 21 November,2003 in Northwest Xinjiang Autonmous Region.
The Project titled "Studies on and Production
of Fibroblast Somatic Cell Cloning in Cattle" was conducted from
March to October 2002 by Xinjiang Gold Cattle Bio.Inc, in cooperation
with the Institute of Zoology, Chinese Academy of Sciences and an Australian
company. A total of 57 cattle were found pregnant in 479 recipients. Finally,
31 calves were born and 12 are still alive.
The microsatellite analysis of these cloned live calves confirmed that the length and the quantity of the 12 calves' gene fragments were the same as the donor cattle's but unrelated with the recipients.
Gold "Bullet" for Gene Study Prepared by Institute of Chemistry
In genetic engineering research a special device
named Gene Gun has been used by the biological scientists. The principle
of this device is that the tiny metallic pellets such as tungsten carrying
snippets of a pathogen's DNA under high pressure penetrate into the cell
skin. The DNA forces the cell to produce pathogen proteins, triggering
the immune system. However, to prepare gold particle "bullet"
with diameter around narrow size micrometer is not an easy job, otherwise
such bullet should be rough. Only a few countries now produce such "bullet".
Recently, researchers in Lab of Colloid and Surfaces
of Institute of Chemistry, CAS, successfully prepared the gold bullet
with diameter around 1.0 micrometer and has used it in the gene gun experiment
conducted in the Institute of Genetic and Developmental Biology, CAS.
It has been shown that the result is good, compatible with the import
gold pullet, while the price of the "bullet" is only 1/20 of
the imported one.
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