Cortisol Binding Globulin 重组蛋白, Mouse (His & AVI)

Cortisol Binding Globulin Protein, Mouse, Recombinant (His & Avi), Biotinylated

产品编号 TMPY-06702 Cortisol Binding Globulin Protein, Mouse, Recombinant (His & Avi), Biotinylated

Cortisol Binding Globulin Protein, Mouse, Recombinant (His & Avi), Biotinylated is expressed in HEK293 mammalian cells with His and Avi tag. The predicted molecular weight is 45.54 kDa and the accession number is Q06770.

规格	价格	库存	数量
20 μg	¥ 3,820	5日内发货
100 μg	¥ 8,840	5日内发货

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常见问题解答

问超声应使用什么样的频率？

答频率建议使用常规的超声清洗频率即可，一般在20 kHz - 100 kHz。

问得到的杀死细胞的 IC50 与网页上 IC50 差距较大怎么办？

答您所测试的IC50是指细胞的增殖抑制实验（半抑制率），细胞增殖抑制实验 IC50值，和网页上的靶点IC50其实是不同的意义。文献里和网页上 IC50其实往往是指对于靶点无细胞实验的抑制率，这样的实验一般是通过激酶或者蛋白纯化实验做出来的，nM 级别的浓度比较常见，但是细胞的增殖抑制实验 IC50 是指细胞的半致死率，同时牵涉到细胞的代谢以及渗透，一般浓度会高一些。另外，同一个化合物对不同细胞模型的效果也是不同的，建议尝试增加孵育量、延长孵育时间。

问抑制剂产品应如何储存？

答粉末储存在 -20℃，可以存 3 年以上。母液一般储存于 -80℃，可以存 1 年以上，建议多分装几管，避免反复冻融。常用的存于 4℃，可放一周以上。

问细胞实验中需要加多少抑制剂？

答通常建议您参考同模型实验发表的文献报道；除参考文献报道以外，还需要通过预实验做“剂量-效应曲线”确定最佳作用浓度（浓度梯度）；通过“时间-效应曲线”确定最佳孵育时间（处理时间梯度）。另外，抑制剂的使用量受多种因素影响，包括抑制对象的可接触性、细胞通透性、孵育时间、细胞种类等等。我们建议通过检索文献确定使用抑制剂的起始浓度。如果有报道的 Ki 值或 IC50 值，可以采用其 5-10 倍的量开始尝试以达到抑制酶活性的最佳效果。如果抑制剂的 Ki 值或 IC50 值未知，则需要在更广泛的范围尝试抑制剂的使用浓度，并采用 Michaelis-Menten 动力学计算 Ki 值。一般设立溶解抑制剂时所采用的溶剂作为对照，以排除溶剂的非特异性影响。

问PEG300 可以用 PEG400 替代吗？

答PEG300 具有适度的粘稠度，有利于药物的溶解和给药过程，同时也能够提供良好的耐受性，不会对动物造成不良影响。PEG400 可以替代 PEG300。 PEG600 不是很建议，因为熔点接近常温。

产品信息

生物活性	Activity testing is in progress. It is theoretically active, but we cannot guarantee it. If you require protein activity, we recommend choosing the eukaryotic expression version first.
产品描述	Cortisol Binding Globulin Protein, Mouse, Recombinant (His & Avi), Biotinylated is expressed in HEK293 mammalian cells with His and Avi tag. The predicted molecular weight is 45.54 kDa and the accession number is Q06770.
种属	Mouse
表达系统	HEK293 Cells
标签	C-Avi-His
蛋白编号	Q06770
别名	SerpinA6,serpin peptidase inhibitor, clade A (α-1 antiproteinase, antitrypsin), member 6,serpin peptidase inhibitor, clade A (alpha-1 antiproteinase, antitrypsin), member 6,Cbg,AV104445,AI265318
蛋白构建	A DNA sequence encoding the Mouse SerpinA6 (Q06770) (Met1-Ala397) was expressed with a C-terminal Avi tag followed by a His tag. The expressed protein was biotinylated in vivo by the Biotin-Protein ligase (BirA enzyme) which is co-expressed. Predicted N terminal: Val 23
蛋白纯度	≥ 95 % as determined by SDS-PAGE. ≥ 95 % as determined by SEC-HPLC.
分子量	45.54 kDa (predicted); 68.15 kDa (reducing conditions)
内毒素	< 1.0 EU/μg of the protein as determined by the LAL method.
缓冲液	Lyophilized from a solution filtered through a 0.22 μm filter, containing PBS, pH 7.4. Typically, a mixture containing 5% to 8% trehalose, mannitol, and 0.01% Tween 80 is incorporated as a protective agent before lyophilization.
复溶方法	A Certificate of Analysis (CoA) containing reconstitution instructions is included with the products. Please refer to the CoA for detailed information.
存储	It is recommended to store recombinant proteins at -20°C to -80°C for future use. Lyophilized powders can be stably stored for over 12 months, while liquid products can be stored for 6-12 months at -80°C. For reconstituted protein solutions, the solution can be stored at -20°C to -80°C for at least 3 months. Please avoid multiple freeze-thaw cycles and store products in aliquots.
运输方式	In general, Lyophilized powders are shipping with blue ice.
研究背景	Corticosteroid-binding globulin (CBG), also known as SerpinA6, is a non-inhibitory member of the serine proteinase inhibitor (serpin) superfamily. It is the high-affinity transport protein for glucocorticoids in vertebrate blood. CBG is specifically cleaved by this protease at a precise site close to its carboxy-terminus. This induces a conformation change and disrupts the binding between glucocorticoids and CBG, and promotes a significant and local release of glucocorticoids (over 90% of them are bound to CBG in human plasma). In this context, CBG directs glucocorticoids to sites of inflammation, and plays in consequence a crucial role in efficient glucocorticoid action in physiology. The SerpinA6 protein is mainly secreted by the liver. This negative acute phase protein regulates free cortisol levels in the blood and distributes cortisol to its target tissues. SerpinA6 deficiency is an extremely rare hereditary disorder characterized by reduced corticosteroid-binding capacity with normal or low plasma corticosteroid-binding globulin concentration, and normal or low basal cortisol levels associated with hypo-/hypertension and muscle fatigue. There are three heritable, human CBG gene mutations that can reduce CBG-cortisol binding affinity and/or reduce circulating CBG levels.