转移酶

NatA is one of the N-terminal acetytransferases in yeast. It is composed of two subunits, NAT1 and ARD1. Defect in one of them leads to loss of activity of NatA.

对酿酒酵母的研究揭示了 3种不同的N末端乙酰基转移酶NatA、NatB、和NatC ，它们将乙酰CoA的乙酰基团转移到蛋白质N末端残基的α氨基上。

The effects of the food additive butylated hydroxyanisole and the antibiotic Norfloxacin on swordtail fish were measured by considering a number of parameters, including glutathione S\|transferase, catalase, 7-ethoxyresorufin-o-dealkylases and malondialdehyde contents.

研究了叔丁基对羟基茴香醚(butylated hydroxyanisole， BHA)和诺氟沙星(norfloxacin， NFLX)对剑尾鱼的急性毒性及其肝脏谷胱甘肽硫转移酶、丙二醛、过氧化氢酶及7-乙氧基异吩恶唑酮-脱乙基酶活性的影响。

Diacylglycerol acyltransferase 1(DGAT1) is a microsomal enzyme that catalyses the final and only committed step in the formation of triglycerides.

二酰基甘油酰基转移酶1(Diacylglycerol acyltransferase，DGAT1)是催化酰基化的辅酶A和二酰基甘油合成甘油三脂的关键限速酶。

Acyl-CoA:cholesterol acyltransferase is the only enzyme of cholesteryl ester synthesis in cells,and plays an important role in balance between cells and organisms cholesterol metabolism.

酰基辅酶A：胆固醇酰基转移酶是细胞内惟一合成胆固醇酯的酶，在细胞和生物体胆固醇代谢平衡中起着重要作用。

Germ-line mutations in the genes hTERT and hTR, encoding telomerase reverse transcriptase and telomerase RNA, respectively, cause autosomal dominant dyskeratosis congenita, a rare hereditary disorder associated with premature death from aplastic anemia and pulmonary fibrosis.

分别编码端粒末端转移酶反转录酶和端粒酶RNA的hTERT和hTR基因的种系突变导致常染色体显性先天性角化不良，它是一种罕见的因为再生障碍性贫血和肺纤维化而早亡的遗传性疾病。

DNA methyltransferases, homing endonucleases, nicking enzymes, specificity subunits and control proteins are also included.

还包括DNA甲基转移酶、趋巢性内切核酸酶、切割酶、专一亚单位和控制蛋白质。

The resistance mechanism of wheat to insects includes tolerance, nonpreference and antibiosis. The dissertation investigates the wheat mechanism, indicators and standard of resistance to aphid and analyses the relation between four kinds of second substance and the wheat resistance to aphid and research the effect of wheat varieties on carboxylesterase and glutathione-s-transferase according to the tests of three mechanism, the content of second substance and the activity of relative detoxification enzyme.

本文通过不同小麦品种的不选择性、抗生性、次生物质含量及麦长管蚜体内有关解毒酶活性的测定，进一步探讨了小麦的抗蚜机制，探索了小麦的抗蚜指标及鉴定标准；研究分析了小麦中4种重要的次生物质含量与小麦抗蚜性的关系；测定了不同小麦品种对麦长管蚜羧酸酯酶和谷胱苷肽-S-转移酶的影响。

There were five groups in the examination of cellular levelK562 group,K562/A02 group,K562+ADM group,K562/A02+ADM group and K562/A02+TTD+ADM group）.The non-cytotoxicity doses to cell lines K562 and K562/A02 of TTD were got by MTT assay.Using flow cytometry (FCM assay to examine the intracellular ADM concentration.There were three groups in the examination of genic,zymologic and protein levelsK562 group,K562/A02 group and K562/A02+TTD group）.The mRNA expression of MDR was measured by fluorescent quantitative reverse transcriptase polymerase chain reaction(RT-PCR.The expression levels of glutathione-S-transferase and topoisomerase Ⅱ were determined by immunohistochemical technique.

细胞水平检测实验分5组（K562组、K562/A02组、K562+ADM组、K562/A02+ADM组和K562/A02+TTD+ADM组），采用MTT法检测TTD对K562和K562/A02细胞的非细胞毒性剂量，流式细胞术检测细胞内阿霉素的浓度，基因、酶学、蛋白水平检测实验分3组（K562组、K562/A02组和K562/A02+TTD组），采用RT-PCR法检测mdr1 mRNA的表达，免疫细胞化学方法检测谷胱甘肽S转移酶π和拓扑异构酶Ⅱ的表达水平，Western-blotting法检测P-糖蛋白和bcl-2表达。

Methods After treated with a specific demethylating agent,Aza and acetylating agent, TSA, the status of 5'CpC island methylation of ING1b gene in HT29 human colon cancer cell line was analyzed using methylation specific polymerase chain reaction,and the level of histone acetylation was analyzed by chromatin immunoprecipitation,and reverse transcription polymerase chain reactionwas used to examine ING1b mRNA expression.

应用特异性DNA甲基转移酶抑制剂5-氮-2'-脱氧胞苷（5-Aza-2'-dc，以下简称Aza）及组蛋白去乙酰化酶抑制剂曲古抑菌素A作用人结肠癌细胞株HT29后，用甲基化特异性PCR检测该ING1b基因核心启动子区域CpG岛甲基化情况，用染色质免疫沉淀检测其乙酰化组蛋白绑定的DNA情况，并用逆转录聚合酶链反应检测ING1bmRNA表达。

The results indicate that aphids number ratio have distinct difference among five wheat varieties, and the wheat varieties resistance to aphid are consistent with those in seedling.

以在感蚜的小麦品种上繁殖10代以上的麦长管蚜作为虫源，在5个不同抗性的品种上饲养5日的时间，而后测定各品种上麦长管蚜羧酸酯酶和谷胱苷肽-S-转移酶的活性和酶体系的蛋白含量。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。