甲基化的

However, because acetylation and methylation are driven by cell signals, the epigenome is dynamic, enabling it to respond to the environment.

但是，因为乙酰化和甲基化是通过细胞信号驱动的，表观组是动态的，使得它能够对环境进行反应。

Four differentially expressed cDNA had been cloned and made function analysis. Homology search in Genbank showed that there were two new sequences; the other is methyl-binding domain protein , phosphoenolpyruvate carboxylase , respectively.

同时，对4个Northern杂交验证的差异表达片段进行了克隆测序，结果表明，有2个为新基因，其余的2个片段可能分别为甲基化区结合蛋白和磷酸烯醇式丙酮酸羧化酶。

By adopting the technology of coinstantaneously synthesizing the two products, the optimal reaction conditions are molar ratio of 1∶1 for MN to BA, in the presence of 10 7 % of catalyst at 80 ℃ for 5 h.

本文采用气-质联用技术作为烷基化工艺的评价手段[4 ] ，研究了三氯化铝催化甲基萘的长链烷基化，考察了催化剂用量、芳烷摩尔比

Our data provide a molecular basis for the interplay of histone demethylation and deacetylation in chromatin remodeling.

这些数据为乳腺癌的脱甲基化和脱乙酰基化的研究提供了分子基础。

Under these conditions, photodegradation of MO mainly involves three intermedial processes: demethylation, methylation and hydroxylation.

其中，最先发生的是脱甲基化反应，而生成产物最多的是羟基化反应。

Last, sulfonation of the methylolated alkaline lignin and its application in Enhanced Oil Recovery had also been discussed.

最后，对羟甲基化麦草碱木素的磺化及其在石油回收中的应用亦进行了探讨。

It can be use as an environment-friendly intermediate and starting material for organic synthesis substituting the poisonous phosgene and dimethyl sulfate in carbonylation and methylation reaction.

它可以代替剧毒的光气和硫酸二甲酯作为环境友好的有机合成中间体和起始物质，应用与羰基化和甲基化反应中。

We prepared the pyrethric acid II through four reactions: esterification, oxidation, decomposition, diesterification. And the original synthesis route of the pyrethric acidII was improved: the yield of oxidation of allyl rise through increasing the activity of Selenium dioxide; in the document, tert-butyl-trans -2, 2-dimethy1-3-(2"-methoxycarbony1-1"-propenyl)cyclopropanecarboxy late was synthesized from tert-butyl-trans-2,2-dimethyl-3-(2 -formyl-r -propenyl) cyclopropanecarboxylate with two steps, with low yield.

我们经过酯化，氧化，成双酯，热分解四步反应，成功地得到了第二菊酸，并改进了原第二菊酸的合成路线：通过改变二氧化硒的活性提高了烯丙甲基的氧化产率；将原路线中醛氧化成羧酸、羧酸酯化的两步反应改为醛和甲醇、二氧化锰等作用一步直接酯化的方法，减少了反应步骤，提高了总收率。

By means of GPC,IR,GC-MS,~(13)CNMR,~1HNMR,Methylation analysisetc,structural properties of PST-1 were identified as follows:The Mwof PST-1 was 3.44×10~6 Da and its optical rotation was _D~(20)=+0.110°(c0.1, H_2O); PST-1 constituted 8 simple sugars and the molar ratio was 2,4-Dimethoxy-Mannose:Rhamnose:Ara-binose:Xylose:Galactose:D-Galacturonic acid:Mannose:D-glucuronic acid=2%:5%:24%:9%:3%:1%:46%:10%;The chief bone of PST-1 was 1,3,6-linked-β-D-Man residue and the side chains contained Furanoid and Pyranoid residues.

结合GPC、旋光度测定、IR、GC-MS、~(13)CNMR、~1HNMR、高碘酸氧化法、Smith降解以及甲基化方法等分析测试方法，得到PST-1的单糖组成及结构表征，实验结果如下：红豆杉多糖PST-1是重均分子量为3.44×10~6 Da的支链多糖，旋光度为20D=+0.110~0(c0.1，H_2O)；PST-1单糖组成为：2，4-Dimethoxy-Mannose：Rhamnose：Arabinose：Xylose：Galactose：D-Galacturonic acid：Mannose：D-glucuronic acid=2％：5％：24％：9％：3％：1％：46％：10％；PST-1的骨架结构为：具有1，3，6-连接的β-D-甘露糖残基骨架，侧链分枝包括非还原末端的呋喃型α-L-阿拉伯糖残基、吡喃型α-L-阿拉伯糖残基、β-D-木糖残基、β-D-甘露糖残基、2，4-二氧甲基-β-D-甘露糖残基和α-D-葡萄糖醛酸残基；侧链的糖残基也可能存在2，5-二氧-取代呋喃型α-L-阿拉伯糖基、3-氧-取代的β-D-木糖残基、6-氧-取代的α-D-半乳糖醛酸残基、6-氧-取代的α-D-半乳糖残基、4-氧-取代的α-D-葡萄糖醛酸残基和2-氧-取代的α-L-鼠李糖残基，同时后者也可能穿插在主链上。

The viscosities which change with the temperature,the transmittancy and the temperature resistance of the samples were studied.

采用环氧氯丙烷作为交联剂，对纤维素原料和羧甲基纤维素成品进行交联改性，采用两种不同的反应途径制备交联改性的CMC产品，通过对各自产品粘度随温度的变化以及透光度、耐温性的研究，发现先羧甲基化后交联的产品的性能更为优异。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。