EphA4 重组蛋白, Mouse (His)

EphA4 Protein, Mouse, Recombinant (His)

产品编号 TMPY-01778

EphA4 Protein, Mouse, Recombinant (His) is expressed in HEK293 mammalian cells with His tag. The predicted molecular weight is 60 kDa and the accession number is Q03137-1.

规格	价格	库存	数量
200 μg	¥ 5,750	5日内发货

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常见问题解答

问抑制剂能否用于动物实验？

答可以的，我们的抑制剂都可以用于动物/体内实验。但有些化合物还没有用于动物实验的文献，这种情况下，建议您先做预实验，确保研究的可行性。

问溶解度中写的“< 1 mg/mL refers to the slightly soluble or insoluble ”是什么意思？

答这句话指的是，如果溶解度 < 1 mg/mL，那我们就认为它是微溶或不溶的，这是针对写的“DMSO：Insoluble”或“DMSO：slightly soluble”这类化合物的。

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.

问购买多次产品，发现颜色不同，怎么办？

答首先请您确认批次，如果是同一个批次产品，请联系技术同事核查产品颜色。如果是不同批次，请您放心，颜色不同可能是生产工艺不同而造成的，生产过程中的操作、温度、时间等因素可能会影响产品的颜色。如果您对该批次有疑虑，可在官网下载相应的质检报告，我们是对产品质量负责的。

产品信息

生物活性	Measured by its binding ability in a functional ELISA. Immobilized mouse EPHA4 at 2 μg/ml (100 μl/well) can bind mouse EFNA5 with a linear range of 1.28-32 ng/ml.
产品描述	EphA4 Protein, Mouse, Recombinant (His) is expressed in HEK293 mammalian cells with His tag. The predicted molecular weight is 60 kDa and the accession number is Q03137-1.
种属	Mouse
表达系统	HEK293 Cells
标签	C-His
蛋白编号	Q03137-1
别名	Tyro1,Sek1,Sek,rb,Hek8,EPH receptor A4,Cek8,AI385584,2900005C20Rik
蛋白构建	A DNA sequence encoding the mouse EPHA4 (NP_031962.2) extracellular domain (Met 1-Thr 547) was expressed, fused with a polyhistidine tag at the C-terminus. Predicted N terminal: Thr 20
蛋白纯度	> 98 % as determined by SDS-PAGE
分子量	60 kDa (predicted); 65 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	EPH receptor A4 (ephrin type-A receptor 4), also known as EphA4, belongs to the ephrin receptor subfamily of the protein-tyrosine kinase family which 16 known receptors (14 found in mammals) are involved: EPHA1, EPHA2, EPHA3, EPHA4, EPHA5, EPHA6, EPHA7, EPHA8, EPHA9, EPHA10, EPHB1, EPHB2, EPHB3, EPHB4, EPHB5, EPHB6. The Eph family of receptor tyrosine kinases (comprising EphA and EphB receptors) has been implicated in synapse formation and the regulation of synaptic function and plasticity6. EphA4 is enriched on dendritic spines of pyramidal neurons in the adult mouse hippocampus, and ephrin-A3 is localized on astrocytic processes that envelop spines. Eph receptor−mediated signaling, which is triggered by ephrins7, probably modifies the properties of synapses during synaptic activation and remodeling. Ephrin receptors are components of cell signalling pathways involved in animal growth and development, forming the largest sub-family of receptor tyrosine kinases (RTKs). The extracellular domain of an EphA4 interacts with ephrin ligands, which may be tethered to neighbouring cells. Ligand-mediated activation of Ephs induces various important downstream effects and Eph receptors have been studied for their potential roles in the development of cancer.

EphA4 Protein, Mouse, Recombinant (His)

EphA4 Protein, Mouse, Recombinant (His)

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