向细胞的

Generally, B in the configuration closest cell's DNA conformation, it and the double helix model are similar. A-DNA and when RNA member double helix area as well as duplication forms the DNA-RNA hybrid molecule conformation is close. Z-DNA take the nucleotide dimer as the unit left-hand winding, its principal chain assumes the denticle the shape, therefore.

一般认为，B构型最接近细胞中的DNA构象，它与双螺旋模型非常相似。A－DNA与RNA分子中的双螺旋区以及转录时形成的DNA－RNA杂交分子构象接近。Z－DNA以核苷酸二聚体为单元左向缠绕，其主链呈锯齿形，故名。

OBJECTIVE: To introduce proteomics, to summarize the research of proteomics in directional differentiation of BMSCs, and to forecast the development of proteomics research methods.

目的：介绍蛋白质组学的概况，总结蛋白质组学在骨髓间充质干细胞向心肌、成骨及脂肪细胞定向分化方面的研究进展，讨论其面临的问题，并对蛋白质组学研究方法进行展望。

At normal state, the separase hasn't activity because of its inhibitor securin. But during the transition from metaphase to anaphase, APC is activated and it discomposes the securin. Then the separse what is a protease has activity and it discompose cohesin. So the sister chromatids separate.

通常情况下分离酶受到保全素(securin/PTTG)的抑制而没有活性，当细胞从有丝分裂中期向后期转变时，APC(anaphase-promoting complex，后期促进复合体)被激活并裂解保全素，具有蛋白酶活性的分离酶裂解粘合姐妹染色单体的粘合素，姐妹染色单体分离。

Results 20 cases of CT examination had made proper diagnoses,the CT imaging finding about the most of peripheral cholangiocarcinoma included:There was the atactic low density tumour in liver,its borderline was unclear,enhanced scan appearances were irregular peripheral enhancement,centripetal enhancement,and delaying enhancement;There was concretion and dilatation of bile buct in or around the focus;The local envelope of liver was lacunose and the local liver was atrophied,There was abroad putrescence and liquescence in the focus.

结果 20例CT做出了正确的诊断，大部分周围型胆管细胞癌的CT表现为肝内不规则低密度肿块边界欠清，增强扫描表现病灶边缘呈不规则环状强化，有向心性强化的趋势，出现延迟强化；病灶内或周围可见结石，病灶内及周围肝内胆管扩张；局部肝包膜回缩、肝叶萎缩，病灶内大片坏死、液化。

All these 5 genes were specifically expressed in morula stage.

兔由母源型调控向合子型调控的过渡是在8～16细胞期开始的，在桑葚期开始表达的这些基因片段应该是兔胚胎时期特异性基因。

All these 5 genes were specifically expressed in morula stage.Maternal-to-zygotic transition of rabbit starts from 8-16 cell stage,and therefore,these genes should be embryo-specific.

兔由母源型调控向合子型调控的过渡是在8～16细胞期开始的，在桑葚期开始表达的这些基因片段应该是兔胚胎时期特异性基因。

Objective: To study the axonal effect and the expression of integrin α6β4 during Schwann cell differentiation and myelination.

目的：探讨轴突对施万细胞(Schwann cells， SC)分化成熟与髓鞘形成的影响，及在SC的极向分化过程中整合素α6β4的表达。

It is said that C〓 alkylthiophene probably originated from fatty acids and C〓 alkylthiophene probably derived from phytol side chain of chlorophyll. The research suggested that fatty acids such palmitic acids transformed into petroleum components more easily at lower temperature than phytol side chain of chlorophyll which transformed massively at 300℃.

据分析C〓烷基-噻吩可能源自脂肪酸，而C〓烷基-噻吩可能源自叶绿素的植醇侧链，这似乎表明，藻细胞中的脂肪酸类比叶绿素的植烷侧链更易于在较低温度下向石油组份转化，而后者在300℃时则大量转化。

Epidemiologic data indicates that breast carcinoma occur tightly with mammary dysplasia. It is a slow-paced course that normal mammary epithelium be transformed to tumorous epithelium.

流行病学资料表明乳腺癌的发生与乳腺增生性疾病密切相关，正常乳腺的上皮细胞向恶性转化，是一个渐进的过程。

Regression of a specialized cell or tissue to a simpler, more embryonic,''.'unspecialized'.

去分化，反分化指高度分化的细胞或组织向更简单，更初期非特化的形式的退化。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。