early embryo造句

• Whole mount in situ hybridization showed that amphihmgb transcripts were present ubiquitously in the early embryos from zygote to neurula , but they decreased gradually in mesoderm and endoderm and neural tube with development , and became restricted to epidermal cells in the hatched larva . it appear s that hmgb plays a role in the mitosis and differentiation of embryonic cells . another amphioxus cdna , amphiubf80 , encoding ubiquitin / ribosomal fused protein s27a , was isolated from the gut cdna library of b . belcheri tsingtauense
  S004cdna序列编码一个156个氨基酸残基组成的蛋白质，与人的泛素蛋白ubf80具有较高的氨基酸序列同源性( 145 / 156同源) ，且该蛋白具有泛素蛋白ubf80所共有的两个结构域，即由72个氨基酸组成的泛素介导的蛋白降解结构域和由48个氨基酸组成的核糖体蛋白s27a结构域。
• The oocytes reconstructed by gv exchange between young and young or young and aged mice showed normal bovine sperm extract or sr2 + - induced ca2 + oscillations in mii stage and normal pkc a distribution in mii oocytes and early embryos . normal meiosis appeared in the oocytes reconstructed by gv exchange between young and young mice
  在年轻小鼠卵母细胞之间以及年轻小鼠与老龄小鼠卵母细胞之间gv互换后的重组卵母细胞表现出正常的牛精子抽提物或sr ~ ( 2 + )诱发的ca ~ ( 2 + )振荡，以及在减数分裂成熟和早期胚胎中表现出正常的pkc分布。
• Since the first embryonic stem cell derivation from mouse blastocyst by british scientists in 1981 , groups of scientists were devoted into the research field of stem cells . in 1998 , two scientific groups of america obtained human embryonic stem cells and human embryonic germ cells respectively from human blastocysts and gonadal ridge of early embryos
  1998年，美国的两个科学家小组分别从人体外受精发育而成的囊胚内细胞团和5 9周龄流产的胚胎原始生殖嵴中，成功获得了人类胚胎干细胞系和人类生殖嵴干细胞系。
• Abstract : the early embryo developmental block is a common phenomenon in mammal when embryos are cultured in vitro . many studies of phosphorus , glucose , hypoxanthine and cytoplasmic factors on early embryo developmental block carried out by different methods such as morphology , biochemistry , molecular biology and micromanipulation have been reviewed . the merit and shortcoming were analyzed and the necessity of using simple or components limited media overcoming early embryo developmental block were also reviewed . media that have been shown effective in overcoming early embryo developmental block in mouse , rat , hamster , rabbit , pig , sheep , cattle and monkey were listed
  摘要哺乳动物胚胎在体外培养中普遍存在早期发育阻滞的现象.对此,人们用形态学、生物化学、分子生物学、显微操作等手段开展了磷酸、葡萄糖、次黄嘌呤和细胞质因素对早期胚胎发育阻滞的影响的研究.本文综合分析了共培养系统的优缺点.说明了采用完全成分已知的培养液对进行有关研究的必要性.列出了有效运用于克服小鼠、大鼠、仓鼠、兔、猪、羊、牛、猴等动物早期胚胎阻滞的成分已知的培养液的名称。
• Alterations in glycosylation have been proposed to participate in cell adhesion , receptor activation , cell differentiation and tissue morphogenesis . because the early embryo is composed of cells that must adhere to other embryonic cells , it seems likely that glycans modulating this adhesion would have been indispensable for early development . genetic elimination or partial abrogation of expression of some major classes of glycans , such as n - glycans , glycosphingolipids , hyaluronan and sialic acids , has been shown to be lethal during murine embryogenesis
  胚胎发育过程中伴随着细胞表面糖链表达水平及结构的改变，研究表明这些改变参与介导了胚胎细胞之间的粘附联系，因此，糖链对于胚胎正常发育是必须的，一些糖链结构(如n -连接糖链，糖鞘脂，透明质酸，唾液酸等)的表达缺失能导致小鼠死亡于胚胎的早期发育阶段。