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- 详细信息
- 文献和实验
- 技术资料
- 保存条件:
We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20℃/-80℃.
- 保质期:
Generally, the shelf life of liquid form is 6 months at -20℃/-80℃. The shelf life of lyophilized form is 12 months at -20℃/-80℃.
- 英文名:
Recombinant Escherichia coli Hydrogen peroxide-inducible genes activator (oxyR), Biotinylated
- 库存:
200
- 供应商:
武汉华美生物工程有限公司
- 规格:
20μg
英文名称:
Recombinant Escherichia coli Hydrogen peroxide-inducible genes activator (oxyR), Biotinylated品名简称:
Recombinant E.coli oxyR protein, Biotinylated货号:
CSB-EP364842ENV-B规格:
20μg价格:
2796LC-MS/Western Blot:
/SDS-PAGE:
(Tris-Glycine gel) Discontinuous SDS-PAGE (reduced) with 5% enrichment gel and 15% separation gel.纯度:
Greater than 90% as determined by SDS-PAGE.内毒素:
Not test生物活性:
/基因名:
oxyRUniprot No.:
P0ACQ4别名:
Morphology and auto-aggregation control protein种属:
Escherichia coli (strain K12)蛋白长度:
Full Length来源:
E.coli分子量:
82.1 kDa表达区域:
1-305aa氨基酸序列:
MNIRDLEYLVALAEHRHFRRAADSCHVSQPTLSGQIRKLEDELGVMLLERTSRKVLFTQAGMLLVDQARTVLREVKVLKEMASQQGETMSGPLHIGLIPTVGPYLLPHIIPMLHQTFPKLEMYLHEAQTHQLLAQLDSGKLDCVILALVKESEAFIEVPLFDEPMLLAIYEDHPWANRECVPMADLAGEKLLMLEDGHCLRDQAMGFCFEAGADEDTHFRATSLETLRNMVAAGSGITLLPALAVPPERKRDGVVYLPCIKPEPRRTIGLVYRPGSPLRSRYEQLAEAIRARMDGHFDKVLKQAV蛋白标签:
N-terminal MBP-tagged and C-terminal 6xHis-Avi-tagged产品提供形式:
Liquid or Lyophilized powder缓冲液:
If the delivery form is liquid, the default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol. If the delivery form is lyophilized powder, the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.储存条件:
We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20℃/-80℃. Our default final concentration of glycerol is 50%. Customers could use it as reference.保质期:
The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself. Generally, the shelf life of liquid form is 6 months at -20℃/-80℃. The shelf life of lyophilized form is 12 months at -20℃/-80℃.货期:
3-7 business days注意事项:
Repeated freezing and thawing is not recommended. Store working aliquots at 4℃ for up to one week.功能1:
Hydrogen peroxide sensor. Activates the expression of a regulon of hydrogen peroxide-inducible genes such as katG, gor, ahpC, ahpF, oxyS (a regulatory RNA), dps, fur and grxA. OxyR expression is negatively autoregulated by binding to a 43 bp region upstream of its own coding sequence. OxyR is inactivated by reduction of its essential disulfide bond by the product of GrxA, itself positively regulated by OxyR. Has also a positive regulatory effect on the production of surface proteins that control the colony morphology and auto-aggregation ability.功能2:
/文献:
/研究领域:
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文献和实验摘要 基因重组蛋白在大肠杆菌中表达时,由于表达量高,往往形成无生物活性的包涵体。包涵体必须经过变性和复性的过程才能获得有活性的重组蛋白。如何提高基因重组蛋白质的复性率,是生物工程技术的一个研究热点。对近年来的重组蛋白质的复性方法做一评述,为研究蛋白质折叠以及复性技术的进一步应用提供依据。 关键词 重组蛋白 包涵体 复性 二硫键 到目前为止,人们表达的重组蛋白质已有4000多种,其中用E.coli表达的蛋白质要占90%以上,尽管基因重组技术为大规模生产目标蛋白质提供
现在低表达时很少形成包涵体,表达量越高越容易形成包涵体。原因可能是合成速度太快,以至于没有足够的时间进行折叠,二硫键不能正确的配对,过多的蛋白间的非特异性结合,蛋白质无法达到足够的溶解度等。 1.2.2、重组蛋白的氨基酸组成:一般说含硫氨基酸越多越易形成包涵体,而脯氨酸的含量明显与包涵体的形成呈正相关。 1.2.3、重组蛋白所处的环境:发酵温度高或胞内pH接近蛋白的等电点时容易形成包涵体。 1.2.4、重组蛋白是大肠杆菌的异源蛋白,由于缺乏真核生物中翻译后修饰所需酶类和辅助因子,如折叠
, renaturation 外源基因在大肠杆菌中的高表达常常导致包涵体的形成,虽然包涵体具有富集目标蛋白质、抗蛋白酶、对宿主毒性小等优点,但包涵体蛋白质的复性率一般都很低,而分子伴侣、低分子量添加物等在复性过程中的应用及新的复性方法的建立都大大提高了重组蛋白质复性产率。 一、包涵体: 1.1包涵体的定义、组成与特性: 包涵体是指细菌表达的蛋白在细胞内凝集,形成无活性的固体颗粒。 一般含有50%以上的重组蛋白,其余为核糖体元件、RNA聚合酶、内毒素、外膜蛋白ompC
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