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 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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TargetMol 的所有产品仅用作科学研究或药证申报，不能被用于人体，我们不向个人提供产品和服务。请您遵守承诺用途，不得违反法律法规规定用于任何其他用途。

常见问题解答

问动物实验常用溶解方法？

答首先，您需要确认给药剂量、给药方式。对于具体的产品，优先找引用我们产品的文献里的使用方法，再找其他文献里的配方。如果没有相关的文献，且该化合物的 DMSO 溶解度比较好，我们推荐通用配方: 10% DMSO+40% PEG300+5% Tween-80+45% Saline/PBS/ddH2O。溶剂依次加入，尽量溶解后再加入下一个溶剂。正常鼠建议 DMSO 浓度在 10% 以下，裸鼠体弱鼠等配方的 DMSO 浓度建议在 2% 以下，根据溶液是否澄清，助溶剂 PEG300、Tween-80 的比例可以适当调整。如果有其他助溶剂也可以使用。以上配方仅供参考，体内配方并不是绝对的，需要根据不同情况进行调整。建议先取少量化合物测试配方，再进行大量配制。配完也可以再使用超声、加热等方式助溶，看看能不能澄清一点。腹腔注射对粉末的溶解度要求比较高，建议购买盐形式化合物。如果给药剂量比较大，也有报道使用混悬液进行腹腔给药的。对于灌胃给药，且剂量比较大的情况下，建议用 0.5% CMC-Na 配置成均匀混悬液进行给药。

问动物不能耐受 DMSO，给药时 DMSO量应该如何控制？

答对于普通的老鼠，DMSO 的浓度应控制在 10% 以下，对于裸鼠、转基因小鼠、耐受性弱的老鼠等，DMSO 浓度需控制在2%以下。对于首次操作的抑制剂，建议先做溶剂阴性对照，确认溶解对动物无非特异性影响。

问Tween-20 可以用 Tween-80 替代吗？

答不建议使用 Tween-20。相较于 Tween-20，Tween-80 的耐受性更好，Tween-80已被用作评估实验药物和毒物的行为影响的工具，且没有明显的副作用。参考文献：Castro CA， Hogan JB， Benson KA， Shehata CW， Landauer MR. Behavioral effects of vehicles: DMSO， ethanol， Tween-20， Tween-80， and emulphor-620. Pharmacol Biochem Behav. 1995 Apr;50(4):521-6.

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。

问准备进行动物实验，收到大包装粉末后，如何分装溶解？

答根据配制出来的溶液是不是澄清的确定一次性能配多少：如果配制出来是澄清溶液，可以一次性多配制一些，储存于4度冰箱，大概一周配一次，放久了可能会失效；如果配制出来是混悬液，建议每次使用的时候都现配现用。

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.