Influenza A H4N8 Hemagglutinin HA1 Subunit (TMPY-02619)

Influenza A H4N8 (A/chicken/Alabama/1/1975) Hemagglutinin/HA1 Protein (His)

产品编号 TMPY-02619 Influenza A H4N8 (A/chicken/Alabama/1/1975) Hemagglutinin/HA1 Protein (His)

Influenza A H4N8 (A/chicken/Alabama/1/1975) Hemagglutinin/HA1 Protein (His) is expressed in HEK293 mammalian cells with His tag. The predicted molecular weight is 37.6 kDa and the accession number is P19695.1.

规格	价格	库存	数量
100 μg	¥ 4,460	5日内发货

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Influenza A H4N8 (A/chicken/Alabama/1/1975) Hemagglutinin/HA1 Protein (His)产品问题解答

问请问有细胞膜P-selectin（CD62P）的抑制剂吗？

答Parmodulin 2（产品编号 T1893 CAS 423735-93-7）和KF38789（产品编号 T22889 CAS 257292-29-8）。

常见问题解答

问细胞实验中，抑制剂如何溶解？

答用 DMSO 配置较高浓度母液，母液存于 -80℃，建议多分装几管，一周内使用的存于 4℃，避免反复冻融。实验时用 pbs、生理盐水、培养基、水这些稀释，细胞实验DMSO的终浓度不超过 0.1%。如果超过 0.1%，则需要在做预试验的时候，先进行溶剂阴性对照实验，排除溶剂对细胞的影响。

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。

问收到粉状试剂粘壁严重，如何处理？

答建议您用离心机 3000 rpm下离心一会儿,将粉末收集到管底。

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.

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	Influenza A H4N8 (A/chicken/Alabama/1/1975) Hemagglutinin/HA1 Protein (His) is expressed in HEK293 mammalian cells with His tag. The predicted molecular weight is 37.6 kDa and the accession number is P19695.1.
种属	H4N8
表达系统	HEK293 Cells
标签	C-His
蛋白编号	P19695.1
别名	Harvey rat sarcoma viral oncogene homolog
蛋白构建	A DNA sequence encoding the N-terminal segment (Met 1-Arg 343) of the influenza hemagglutinin (A/chicken/Alabama/1/1975 (H4N8)) (P19695.1), termed as HA1, was fused with a polyhistidine tag at the C-terminus. Predicted N terminal: Gln 17
蛋白纯度	> 97 % as determined by SDS-PAGE
分子量	37.6 kDa (predicted); 55 kDa (reducing condition, due to glycosylation)
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	The influenza viral Hemagglutinin (HA) protein is a homotrimer with a receptor binding pocket on the globular head of each monomer.HA has at least 18 different antigens. These subtypes are named H1 through H18.HA has two functions. Firstly, it allows the recognition of target vertebrate cells, accomplished through the binding to these cells' sialic acid-containing receptors. Secondly, once bound it facilitates the entry of the viral genome into the target cells by causing the fusion of the host endosomal membrane with the viral membrane. The influenza virus Hemagglutinin (HA) protein is translated in cells as a single protein, HA, or hemagglutinin precursor protein. For viral activation, hemagglutinin precursor protein (HA) must be cleaved by a trypsin-like serine endoprotease at a specific site, normally coded for by a single basic amino acid (usually arginine) between the HA1 and HA2 domains of the protein. After cleavage, the two disulfide-bonded protein domains produce the mature form of the protein subunits as a prerequisite for the conformational change necessary for fusion and hence viral infectivity.