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To study the applicable prospect of suicide gene on tumor therapy in clinic,we cloned the gene of D-amino acid oxidase and the gene of yeast cytosine deaminase.We hope to establish the transgenic mices of DAAO gene and YCD gene,and the two transgenic strain mices are valuable animal system for studying the biological characteristic of DAAO gene and YCD gene ,for studing the killing activity of DAAO/D-Ala and YCD/5-FC gene therapy systems on tumor.The D-amino acid oxidase gene derived from R.gracilis and it could oxidize D-amino acids. Hydrogen peroxide(H2O2) is a reactive oxygen species generated in the deamination of D-Ala catalyzed by DAAO.

为了探讨自杀基因在临床肿瘤治疗中的应用前景，建立自杀基因肿瘤治疗评价的动物模型，我们克隆了D-氨基酸氧化酶(D-amino acid oxidase，DAAO)基因和酵母菌胞嘧啶脱氨酶(yeast cytosine deaminase，YCD)基因，希望建立DAAO基因及YCD基因转基因小鼠，为研究DAAO及YCD基因的生物学特性、开发和评价DAAO／D-Ala及YCD／5-FC自杀基因系统进行肿瘤治疗建立良好的实验动物模型。

"Population figures are rounded to the nearest 100 while percentages are rounded to 1 decimal place and percentages are derived from the corresponding unrounded figures.

"1。"，人口数目均凑整至最接近的百位数，百分率是由未进位的相关数字衍生而经过四舍五入的凑整至一个小数位。

The formula of the overlap area and the overlap rate were derived from its definite integral form.

并利用积分方法，推导出了林木树冠发生重叠时的重叠面积和重叠率的计算公式。

Tremendous yields are derived from the spectacle of the bourgeois elections, demonstrably so with the television news networks.

巨大的收益来自壮观的资产阶级选举，显然这样的电视新闻网络。

A probability density function of the strain applied is derived from random vibration theory.

根据随机振动试验的有关理论确定产品局部应变载荷的概率密度函数。

The core of this article is whether the regulation of minimum capital requirments of LLC derived from path dependance are justified,and what model of rule is an optimal arrangement.

本文的核心话题是：路径依赖下派生的我国有限责任公司最低资本额规制是否妥当，何种规则模式下的安排，方为最优。

This model derived from equation (6) for the three variables are

这种模式源于方程（ 6 ）的三个变量是

Two integral equations are derived from the equation of conservation of current.

从电流守恒条件出发，得到了两个积分方程。

The visco-elastic constitutive equation is derived from the regressed creep equations in this paper.

本文在回归公式的基础上推导出粘弹性变形本构方程。

Derived from energy equation and R.

从能量守恒的角度，运用R。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。