查询词典 enzyme

Recently, a Horts Research team in New Zealand isolated from unedible kiwifruit variety the last undiscovered enzyme in the pathway in Vitamin C biosynthesis and proved that the enzyme controlled Vitamin C levels in plants.

新西兰园艺与食品研究所2007年8月31日消息，新西兰园艺与食品研究所的一个研究小组近日从不可食用的奇异果中提取了最后一种在维生素C生物合成中未被发现的酶，并证明了这种酶能控制植物中维生素C的水平。

Crude enzyme liquid alone had no function in decolorization, while mycelium had great function in decolorization. When added H2O2 and veratryl alcohol into the crude enzyme liquid, the decolorization rate had increased from 0% to more than 30%, so the H2O2 and veratryl alcohol played roles in the decolorization.

在利用粗酶液废水脱色研究时，发现粗酶液单独没有脱色作用，有菌体存在时脱色效果明显：粗酶液中加人过氧化氢和黎芦醇后，脱色率由0％增至30％以上，，因此酶与染料作用过程中也需要过氧化氢和黎芦醇作为中间体。

Two molecular forms of Xenopus hatching enzyme, 60kD and 40kD molecules, was obtained during preparation and purification. Both of them were verified as the hatching enzyme molecules, using anti GST UVS.2 antibody as the probe. 60kD molecule was digested or autodigested easily into 40kD molecule during purification. It was indicated that 40kD molecule was probably derived from 60kD molecule with its two CUB repeats lost, and the two CUB repeats may play an important role in recognizing and/or modifying of the molecular structure of vitelline envelope.

在分离纯化非洲爪蟾孵化酶时，得到了60kD和40kD两种分子，用孵化酶的特异性抗GST-UVS.2抗体进行Western杂交的结果证明二者均为孵化酶分子。60kD分子很不稳定，在纯化过程中极易降解，40kD分子可能是由60kD分子经过降解或自身降解丢失了两个CUB重复区而形成的，而CUB重复区很可能在对受精膜分子结构的修饰或改造中具有重要作用。

This research is the combination of enzyme immunoassay and voltaic enzyme sensor.

研究的技术背景电催化酶促反应，文中对其动力学进行了理论分析。

Zymologic analysis showed that the molecular weight of this β-mannanase was approximately 47 kD. The enzyme was stable when pH ranged from 5.0 to 6.5 and could be activated by Na+ and Ba2+. With an optimal temperature of 50°C. Action mode analysis of TLC re-vealed that the enzyme belonged to the endo-β-mannanase family.

酶学性质分析：该酶分子量约为47 kD，酶的最适反应温度为50°C，在pH 5.0~6.5之间该酶的稳定性较好； Na+和Ba2+对该酶有激活作用，用TLC对酶产物分析，表明该酶为内切β-甘露聚糖酶。

Itamin D from the skin and diet is metabolized in the lier to 25-hydroxyitamin D (Figure 1), which is used to determine a patient's itamin D status1,2,3,4; 25-hydroxyitamin D is metabolized in the kidneys by the enzyme 25-hydroxyitamin D-1-hydroxylase (CYP27B1) to its actie form, 1,25-dihydroxyitamin D.1,2,3,4 The renal production of 1,25-dihydroxyitamin D is tightly regulated by plasma parathyroid hormone leels and serum calcium and phosphorus leels.1,2,3,4 Fibroblast growth factor 23, secreted from the bone, causes the sodium–phosphate cotransporter to be internalized by the cells of the kidney and small intestine and also suppresses 1,25-dihydroxyitamin D synthesis.5 The efficiency of the absorption of renal calcium and of intestinal calcium and phosphorus is increased in the presence of 1,25-dihydroxyitamin D (Figure 1).2,3,6 It also induces the expression of the enzyme 25-hydroxyitamin D-24-hydroxylase (CYP24), which catabolizes both 25-hydroxyitamin D and 1,25-dihydroxyitamin D into biologically inactie, water-soluble calcitroic acid.2,3,4

从皮肤和食物来的维生素D在肝中代谢为25-羟基维生素D（图1），被用来决定病人体内维生素D情况的1，2，3，4；25-羟基维生素D在肾中被25-羟基维生素D1羟化酶（CYP27B1）转变为有活性的1，25-二羟基维生素D 。1，2，3，4由肾产生1，25-二羟基维生素D是被血浆甲状旁腺激素和血清钙，磷水平紧密调节。1，2，3，4由骨分泌的成纤维细胞生长因子23使钠磷协同转运蛋白被肾和小肠细胞内化及抑制1，25-二羟维生素D合成。5 在1，25-二羟基维生素D作用下肾和小肠吸收钙及磷的效率增高(图1)。2，3，6 它也包括25-羟四- 24 -羟化酶的表达(CYP24)，且将1，25二羟基维生素D和25羟基维生素D异化成无生物活性，水溶性的维生素D3-23羧酸。2，3，4

The isolation of enzyme in cell . the feature of reaction catalyzed by key enzyme

细胞内酶的隔离分布；关键酶所催化反应具有的特点。

The enzyme activity of PPO showed a decreasing trend with the prolonging of heat-preservation time, which indicated that PPO was a kind of thermal-susceptible enzyme. Three kinds of inhibitors all had inhibitors on the activity of PPO from C. comas. Among them, the inhibition of NaHSO3 was strongest, followed by ascorbic acid and citric acid.

PPO酶活性随保温时间的延长呈降低趋势，说明PPO是一种热敏感性酶。3种抑制剂对鸡腿菇PPO活性均有抑制作用，其中NaHSO3的抑制作用最强，抗坏血酸和柠檬酸次之。

These data prove that the enzyme is compartmented in its functional sites, and so provide evidence to support the possible widespread biological function of the enzyme in catalyzing starch breakdown in plant living cells or at least in living cells of plant storage organs.

这些结果明确地展示出甘薯块根生活细胞中β-淀粉酶与其淀粉基质居于同一亚细胞区域内，为β-淀粉酶普遍参与植物生活细胞或贮藏器官生活细胞中的淀粉水解提供了证据。

This dissertation focuses on the development of a new strategy for preparing enzyme conjugates using nanoparticles as carriers and their application in Enzyme-linked immunosorbant assay.

本文围绕一种基于二氧化硅纳米颗粒的免疫酶标记物的制备方法展开。

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。