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ABSTRACT This paper demonstrated that supplementing valine, isoleucine and leucine in synthetic media had different effects on biosynthesis of multi-components of biotechspiramycin.

在合成培养基中分别添加缬氨酸、异亮氨酸与亮氨酸考察其对必特螺旋霉素生物合成的影响,证明Val、Ile及Leu对必特螺旋霉素多组分的合成有着不同的调节作用。

The robustness of this model is discussed by using the S-system model. And the influences of cell growth rate on the biosynthesis of tryptophan, stability and dynamic behavior of the trp operon are investigated. A steady-state optimization model is established. It maximizes the accumulative term accounting for both consumption and secretion. The nonlinear optimization problem is approximately transformed to a linear optimization problem.

本文对表达阻遏蛋白的基因和表达合成色氨酸关键酶的基因之间相互作用进行了研究,通过模型考察了比生长速率对色氨酸生物合成和系统稳定性的影响,对色氨酸合成过程所涉及到的mRNA、酶等的动态行为进行了理论预测和分析,通过S-系统方程将非线性系统转化为线性系统,研究了系统的鲁棒性,并对色氨酸生产进行了优化。

They are classified into three basic structural types according to the arrangement of the C-9/C-10 skeleton to form the Corynanthe, Aspidosperma and Iboga types, typified by ajmalicine, vindoline and catharanthine, respectively.

单萜吲哚生物碱因其骨架和官能团的丰富变化,加上它们的生物活性,多年来一直哟引着一代又一代的化学家对其进行结构和合成研究,它们的共同生物合成前体strictosidine是由色胺和单萜苷secologanin缩合形成的。

All the results were essential for the cloning of cytosinpeptidemycin biosynthetic genes and illustrating the total biosynthesis.

以上工作对克隆获得完整的嘧肽霉素生物合成基因簇、研究嘧肽霉素的生物合成途径具有重要意义。

The promoted taxanes production by addition of precursors can not be explained completely with taxol biosynthetic pathway presumed.

依据已推测的生物合成途径不能完全解释已证明有效的前体对紫杉烷生物合成的影响。

In this review, the biosynthetic pathway of ginsenosides was introduced and the research progress on enzymes related to ginsenoside biosynthesis , such as 3-hydroxy-3-methyl-glutaryl-CoA reductase, geranyl pyrophosphate synthase, farnesyl pyrophosphate synthase, was summarized in detail.

本文综述了人参皂苷的生物合成途径,并介绍了3-羟基-3-甲基戊二酸CoA还原酶、牻牛儿基二磷酸合成酶、法尼基二磷酸合成酶等人参皂苷合成途径相关酶的研究进展。

In addition to furthering our understanding of the ecological and evolutionary aspects of desert plants to their environment, research on mucilaginous seeds will be helpful in building a model system for exploring gene control mechanisms of carbohydrate synthesis and secretion, secondary cell wall biosynthesis and cell morphogenesis.

对粘液种子的研究不仅可全面揭示荒漠植物的生态适应机制及其进化生态意义,还可为研究基因控制的糖类生物合成和分泌、细胞次生壁的生物合成及形态分化建立理想的模式体系。

The content of intermediates such as protochlorophyll,Mg protoporphyrinand protoporphyrin IXwere reduced and δ aminolevulinc acid and porphohilinogenwere markedly accumulated in albino seedlings of W1,which proved that there was a blockage in the formation of uroporphyrinogen or coproporphyrinogen during Chl biosynthesis under lower temperature.

白化苗中Chl生物合成的中间产物原叶绿素、镁原卟啉、原卟啉IX含量减少,而δ氨基酮戊酸和胆色素原大量积累,证明突变体W1低温下Chl生物合成卟啉原形成部位受阻

It was found that zymosterol in S. cerevisiae GL7 cells and cycloartenol in P. wickerhamii cells were accumulated when treated with solasodine. Zymosterol and cycloartenol are respective substrates of sterol 24Cmethyltransferase in S. cerevisiae GL7 and P. wickerhamii, hence we deduced that sterol C-24-methyltransferase is the main target of solasodine.

根据澳洲茄胺对S.cerevisiae GL7和P.wickerhamii的甾醇生物合成途径的抑制结果均积累24位甾醇甲基化转移酶的底物,分别是zymosterol和cycloartenol,初步阐明了澳洲茄胺的主要作用靶点是24位甾醇甲基化转移酶,而其它几种抗真菌生药活性成分不影响甾醇的生物合成途径。

Red cell membrane damnified by oxidation can be recovered with LSPC at 5.0 g/mL, the fluorescence polarization degree of the membrane was similar to normal level, indicate that increased anisotropic by membrane oxidation decreased with LSPC.2 Antioxidation Effect of LSPC on skinLSPC can improve body antioxidation ability by increasing the antioxidase synthesis and its activity in skin and serum.

半体内法测得LSPC能显著激活NK细胞活性。表明,LSPC对免疫功能有较强的调节作用。4莲房原花青素对酪氨酸酶及黑色素生物合成抑制作用初步研究 LsPC对黑色素的生物合成有显著的抑制作用。7.8 X10一49/L一5.09几LsPc对酪氨酸酶活力有抑制作用,其中,7.8 X1049/L一0.19/L时,随LsPC浓度增大抑制率下降;0.lg/L~4.og/L时,随着LSPC浓度增大抑制率逐渐增高,最大抑制率高达99.9%,且该抑制作用属于可逆的竞争性抑制。

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On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面,更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值,分为几个相等的区间作为横轴,并将各区间内所测定值依所出现的次数累积而成的面积,用柱子排起来的图形,也叫做柱状图。

You rap, you know we are not so good at rapping, huh?

你唱吧,你也知道我们并不那么擅长说唱,对吧?