类酶

The results show that all the hmgr genes from pigs, cattle and chickens are astable enzyme proteins with the same gene sequence characteristics and encoding protein and physical and chemical properties; all the amino acid sequences have a high degree of homology, containing two conservative HMG-CoA binding motifs and two NADPH binding motifs; all the amino acid sequences, containing signal peptide, are secreted proteins; they are all hydrophobic transmembrane proteins with five transmembrane domains; random coil and α-helix are the main structural elements in the HMGR polypeptide chain; all the predictions of three-dimensional structure are V- shaped; there are more closer evolution relationship between the HMGR gene from pigs and cattle.

结果表明：猪、牛和鸡HMGR基因序列特点及编码蛋白质理化性质基本相同，均属不稳定类酶蛋白；保守结构域氨基酸序列具有高度的同源性，均含有保守的2个β-羟基-β-甲基戊二酸单酰辅酶A结合基序和2个还原性烟酰胺腺嘌呤二核苷酸结合基序；均有信号肽，属分泌型蛋白质；属于跨膜的疏水性蛋白，均有5个跨膜结构域；无规则卷曲和α-螺旋是HMGR多肽链中的主要结构元件；三维结构预测都呈"V"字形；猪和牛HMGR基因的进化关系最近。

It is well known that metal ions play important roles in the catalysis of a large number of different enzymes.

金属离子是许多不同酶分子中不可缺少的重要组成部分，并在酶的结构和功能中发挥着重要的作用，特别是含锌离子的酶，由于遍布于六大类酶中的每一类而更加引人注目。

All these pathways seem isopenteny pyrophosphate as the primary production and controlled by many different enzymies.

萜类化合物的合成较为复杂，其过程受多种酶协调控制，根据各种酶在萜类合成不同阶段的作用，可将其分为Ⅰ、Ⅱ、和Ⅲ类酶。

Spraying with chitosan of different concentration significantly increased the content of chlorophyll ,anthoxanthin ,chlorogentic acid, polyphenal ,soluble protein and total soluble sugar of Broccoli flowers. 40 mg L-l chitosan showed the most remarkable effet,compared to control, the content of chlorophyll ,anthoxanthin ,chlorogentic acid, total soluble sugar and soluble protein of treated Broccoli flowers increased by 64.4%,282.5%,35.6%,16.2% 22.7% respectively.PAL and PPO are key enzymes in synthesize of phenolics.No relation was found between phenolics synthesize and PAL activity in Broccoli flowers,but it showed positive relation between phenolics synthesize and PPO activity.

研究表明，本研究中，不同浓度几丁聚糖喷施对青花菜花球的叶绿素、类黄酮、绿原酸、多酚总量、可溶性蛋白及可溶性总糖的含浙江大学硕卜学位论文(2004)量有显著增加，其中以浓度为40mgL一'影响最为显著，花球中的叶绿素、类黄酮、绿原酸、可溶性总糖、可溶性蛋白分别较对照提高64.4%、282.5%、35.6%、 16.2%、22.7%，苯丙氨酸解氨酶、多酚氧化酶是酚类物质合成中关键酶，花球内酚类物质合成与苯丙氨酸解氨酶的活性没有一定的相关性，而与多酚氧化酶的活性呈正相关。

Objective To estimate the occurrence of derepressed hyperproduction AmpC β-lactamases,extended-spectrum β-lactamasesand dual enzyme expression ,as well as drug resistance profile in Enterobacter cloacaeisolates at large hospitals in Wuhan.

目的 了解近两年武汉地区四家教学医院院内感染阴沟肠杆菌耐药现状，以及去阻遏持续高产AmpC酶和超广谱β-内酰胺酶及同时表达这两类酶的发生率。

Psychrophilic bacteria will be a likely source of such enzymes.

嗜寒性细菌可能成为这类酶的来源。

Compared with thermozyme,the first-class structure change of the psychrophilic enzyme can lead to space structure change and the structure of the enzyme is more flexible.Thus,this enzyme can catalyze with less energy in low temperature.

与嗜温酶相比，嗜冷酶一级结构的变化导致空间结构的变化，使酶分子的构象具有更大的柔性，同时也有利于这类酶在低温条件下需要更少的能量而发挥催化作用。

These enzymes are incapable of breaking down or digesting wool,hair or silk fibres which are to them indigestible protein.

这些酶不会降解毛类，毛发及丝类纤维。这些蛋白对于这类酶来说是不可降解的蛋白。

Apoenzyme: The protein portion of an enzyme, exclusive of any organic or inorganic cofactors or prosthetic groups that might be required for catalytic activity.

多功能酶或串联酶：一些多酶体系在进化过程中由于基因的融合，多种不同催化功能存在于一条多肽链中，这类酶称为多功能酶。

An experiment was conducted with mixed materials of chicken excrement and wheat straw to study the changes of some hydrolyses activities, pH value, and election conductance rate during an aeration composting process in a static state.

在静态通气条件下，以养鸡场鸡粪、小麦秸秆为原料，研究了堆腐过程水解类酶活性、pH值、电导率变化。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。