Established upon the embryo stem cell technique and homologous recombination, gene targeting has been widely used in the genome specific manipulation.
基因打靶技术是建立在胚胎干细胞和同源重组技术之上，可对基因组进行定点修饰的实验方法。
However, nuclear reprogramming, which stands in the way of reconstructed embryo stem cell research, is still a bottleneck in the procedure of nuclear transfer.
但是核重编程仍是核移植技术的瓶颈，制约了重构胚胎干细胞的研究。
Researchers have succeeded in developing a human embryonic stem-cell line from an embryo that had died naturally.
研究者已经成功的从自然死亡的胚胎当中培育出了一个人胚胎干细胞系。
The effect of feeder cell type, growth factors, and embryo developmental stage on establishment of sheep embryonic stem cell was also studied in present experiment.
同时，比较了饲养层细胞类型、生长因子、胚胎发育阶段等因素对绵羊胚胎干细胞分离培养效果的影响。
Cancer patients from normal cell nucleus to replace the nucleus of human embryos, embryo transfer and the establishment of stem cell lines.
抽取癌症病人正常细胞的细胞核，替换人类受精卵细胞核，进行胚胎移植，建立干细胞系。
The International Stem Cell Corporation (ISCo), in Oceanside, California, for one, reckons it can do so and, at the same time, deal with the ethical issue of embryo destruction.
比如，坐落于加州欧申赛德的国际干细胞公司就是其中一个，该公司认为他们不仅能完成Geron所做的，并能同时处理好杀死胚胎方面的道德问题。
Objective In order to investigate whether the 12-week-old embryo brain choroid plexus epithelial cells have neural stem cell biological properties.
目的探讨人12周龄胚胎脑脉络丛上皮细胞是否具有神经干细胞的生物学特性。
Dr Noggle and Dr Egli were then able to create pluripotent stem cells from their tiny embryo-but these had chromosomes both from the egg and the skin cell, making them useless for therapy.
之后，DrNoggle和DrEgli就能从这个小胚胎细胞得到多能干细胞-但这一细胞即拥有卵细胞又拥有表皮细胞的染色体，所以还不能用于医疗用途。
In 2002, China's first strain of human embryo hemopoietic blood stem cell was founded successfully in the department of Pediatric Hematology.
2002年，小儿血液科中国第一株人胚胎造血干细胞系建系成功；
In 2002, China's first strain of human embryo hemopoietic blood stem cell was founded successfully in the department of Pediatric Hematology.
2002年，小儿血液科中国第一株人胚胎造血干细胞系建系成功；
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