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HSP70 Protein, Human, Recombinant (His)

产品编号 TMPY-02443

HSP70 Protein, Human, Recombinant (His) is expressed in Baculovirus insect cells with His tag. The predicted molecular weight is 72.2 kDa and the accession number is A8K5I0.

HSP70 Protein, Human, Recombinant (His)

HSP70 Protein, Human, Recombinant (His)

产品编号 TMPY-02443
HSP70 Protein, Human, Recombinant (His) is expressed in Baculovirus insect cells with His tag. The predicted molecular weight is 72.2 kDa and the accession number is A8K5I0.
规格价格库存数量
100 μg
¥ 3,820
现货
200 μg
¥ 6,530
5日内发货
500 μg
¥ 13,220
5日内发货
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实验操作小课堂
常见问题解答
如何稀释工作液?
根据您的工作液浓度,计算母液所需要稀释的倍数和所需母液的体积。建议用水、生理盐水、PBS等溶剂进行稀释,如果是细胞实验,可以使用培养基。 取适当的溶剂缓慢加入到母液中,直到达到您的工作液浓度,可以通过涡旋或者移液枪轻轻吹打帮助混匀。 我们的化合物大部分是脂溶性的,所以在使用 PBS 或者培养基等稀释工作液的时候,会有沉淀析出,这些都是正常现象,大多时候可以通过超声完全溶解。 工作液建议现配现用!
细胞实验中,抑制剂如何溶解?
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。
超声一般需要多久?
超声时长和溶解的量和浓度都有关,一般建议半个小时左右,如果浓度接近最大溶解度,或者需溶解的粉末较多,建议延长超声时间,并辅以加热。
得到的杀死细胞的 IC50 与网页上 IC50 差距较大怎么办?
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。
抑制剂加 DMSO 配成母液之后,能否放在常温的环境保存1周?
不建议这么做,母液配置好分装保存,建议存于 -20℃ 或 -80℃,尽量避免反复冻融。如果您订购的规格很大,可以考虑分装粉末保存,固体粉末是比较稳定的,-20℃ 可以保存三年。
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产品信息

生物活性
1. Measured by its ability to bind human PARP1 in a functional ELISA. 2. Measured by its ability to bind mouse PARP1 in a functional ELISA.
产品描述
HSP70 Protein, Human, Recombinant (His) is expressed in Baculovirus insect cells with His tag. The predicted molecular weight is 72.2 kDa and the accession number is A8K5I0.
种属
Human
表达系统
Baculovirus Insect Cells
标签N-His
蛋白编号P0DMV8
别名
HSPA1,HSP72,HSP70I,HSP70-1A,HSP70-1,HEL-S-103,heat shock 70kDa protein 1A
蛋白构建
A DNA sequence encoding the human HSPA1A (NP_005337.2) (Ala2-Asp641) was expressed, with a polyhistidine tag at the N-terminus. Predicted N terminal: His
蛋白纯度
> 85 % as determined by SDS-PAGE
HSP70 Protein, Human, Recombinant (His)
分子量72.2 kDa (predicted)
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 20 mM Tris, 500 mM NaCl, pH 7.4, 10% gly. 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
HSPA1A is a member of the Hsp70 protein family. The 70 kilodalton heat shock proteins (Hsp70s) are a family of ubiquitously expressed heat shock proteins. HSP are abundant and conserved proteins present in all cells. Upon temperature shock or other stress stimuli, HSP is synthesized intracellularly, which may protect cells from protein denaturation or death. Extracellularly, HSP can serve a cytokine function to initiate both innate and adaptive immunity through activation of APC. HSP serves also a chaperone function and facilitates the presentation of antigen peptide to T cells. Molecular chaperones of the Hsp70 family have diverse functions in cells. They assist the folding of newly synthesized and stress-denatured proteins, as well as the import of proteins into organelles, and the dissociation of aggregated proteins. The well-conserved Hsp70 chaperones are ATP dependent: binding and hydrolysis of ATP regulate their interactions with unfolded polypeptide substrates, and ATPase cycling is necessary for their function. All cellular functions of Hsp70 chaperones use the same mechanism of ATP-driven polypeptide binding and release.

SCI 文献

计算器

  • 复溶 计算器
  • 重组蛋白稀释 计算器
  • 比活力 计算器

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