查询词典 mutation

Objective: To study the role of the hereditary breast and orarian cancer susceptibiliry gene mutation and estrogen receptor in breast cancer and study the relationship between BRCA1 and ER.

目的 探讨与遗传性乳腺癌与卵巢癌相关的易感基因(Hereditary breast and orarian cancer susceptibility gene， BRCA1)基因突变、雌激素受体(Estrogen receptor， ER)在乳腺癌中的作用以及二者之间的关系。

A mispairing PCR-RFLP technique was applied in this study to determine the Insulin-like Growth Factor 2(IGF2) gene intron3 G3072A mutation in an outbred Landrace and Large White, and the gelded boars from Landrace×Large White cross. The difference of corresponding traits and the genetic effects of the boars inherited from parental A allele and inherited from parental G allele were analyzed.

采用错配PCR-RFLP技术鉴别了长白猪和大白猪纯种以及长白×大白猪杂交后代去势公猪胰岛素样生长因子2(IGF2)基因内含子3的3072位点变异，分析了遗传来自父本不同等位基因个体间的相关性状差异及不同等位基因的遗传效应。

Each unitis of different biotic characters and displays different features of seawater composition during the time. 2 The black unit including a biotic extinction was caused by oceanic anoxic event. Crisis that deepwater keeled foraminifera encountered represents a ferocious anoxia in deep marine environment . Biotic recovery in gray unit reflects gradually improved marine circumstance. What the biotic extinction at the C/T boundary in black unit reflects an environmental mutation, whereas the gradual biotic change characterize the recovery of marine dissolved oxygen environment in a stepwise process. The red unit is the result of oxic deposition and characterized by extremely abundance of foraminiferal faunas, which reflects a high-oxidized marine circumstance. 3 As the most ordinary biotic index in paleoceanography researches, foraminifera represent anexcellent environmental indicator in this paper.

三套岩层表现出不同的生物特征，并指示出当时海水的不同性质。2黑层段是大洋缺氧造成的结果，生物大量灭绝，深层水具旋脊有孔虫的所遭受的危机反映出当时海洋深层水体严重缺氧的特征；灰层段中生物的恢复反映出海洋环境自缺氧事件之后的逐步改善过程，与黑层段反映的C/T 界线处生物绝灭反映的环境突变不同，灰层段生物特征的渐变指示出当时海洋溶解氧环境的恢复也是一个逐步的过程；红层段属于富氧沉积的产物，特征是有孔虫生物的极度繁盛，反映的是一种高氧化性的海洋环境。3有孔虫作为古海洋研究中最常用的生物指标，在本文研究中显示了良好的环境指示性。

Objective : To study the effects of Panax quinguefolium on anti-mutation and cell proliferation.

摘 要：目的：研究西洋参抗突变作用和对细胞增殖的影响。

The effects of panD mutation on the production of EPS and extracellular enzymes were also determined.

这一结果表明，Xcc 8004中泛酸合成途径与大肠杆菌存在一定的差异。

Objective To investigate the clinical significance of BRAF mutation and B-raf protein expression in tumorigenesis of papillary thyroid carcinoma.

目的 探讨BRAF基因点突变及B-raf蛋白表达在甲状腺乳头状癌发生中的临床意义。

MC4R gene mutation seems to be an important cause of obesity in Chinese papulation.

人MC4R基因位于染色体18q22，仅一个外显子，编码332个氨基酸的蛋白质。

In order to evaluate resistance risk of Phytophthora parasitica var. nicotianae to metalaxyl, the metalaxyl-sensitive strain 240 and metalaxyl-resistant strain191 were studied. The results showed that the mutation rate of metalaxyl-sensitive strain 240 was 7.0×10–5 on CA medium with metalaxyl concentration of 10μg/mL.

为了评估烟草黑胫病菌对甲霜灵的抗药性风险，以对甲霜灵敏感和高抗的烟草黑胫病菌240和191为出发菌株，进行了抗性突变频率测定、抗性诱变、抗性水平测定、遗传稳定性、生长速率、致病性测定和适合度等研究。

In chronic lymphocytic leukemia there is high frequency of loss of heterozygosity and mutation of atm gene, which related to pathopoiesis and progression of CLL.

慢性淋巴细胞白血病可出现高频率的atm基因杂合性缺失和核苷酸突变，并与其发病及侵袭性病程有关。

Objective To decide the base sequences of target position for gene therapy, the K-ras point mutation and its style at codon 12 in human pancreatic cancer cell line Patu 8988 was detected.

目的 检测人胰腺癌细胞株Patu 8988 K-ras基因点突变及其突变方式，明确基因治疗靶点的碱基序列。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。