Human respiratory syncytial virus RSV TMPY-06111

Human respiratory syncytial virus (RSV) (subtype A, strain Long) glycoprotein G Protein (His)

产品编号 TMPY-06111

Human respiratory syncytial virus (RSV) (subtype A, strain Long) glycoprotein G Protein (His) is expressed in HEK293 mammalian cells with His tag. The predicted molecular weight is 27 kDa and the accession number is P20895-1.

规格	价格	库存	数量
100 μg	¥ 6,390	5日内发货

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常见问题解答

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。

问抑制剂加 DMSO 配成母液之后，能否放在常温的环境保存1周？

答不建议这么做，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。

问母液配置的计算方法？

答（1） c=n/v=m/M/v 浓度=物质的量/体积=质量/相对分子质量/体积（2）官网产品详情页下方有溶液配制表格，可以参考计算好的加入溶剂体积

问加药后检测结果没有作用，是不是产品质量有问题？

答产品质量没有问题，都是经过两次严格质检的，HNMR确定产品结构，HPLC确定化合物纯度。同一个抑制剂由于实验材料（细胞、动物）的不同，IC50 和实验效果也是不一样的，不能照搬文献报道的方法，应该根据自己的实验设立浓度梯度，得到一个最适合的浓度。

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	Human respiratory syncytial virus (RSV) (subtype A, strain Long) glycoprotein G Protein (His) is expressed in HEK293 mammalian cells with His tag. The predicted molecular weight is 27 kDa and the accession number is P20895-1.
种属	RSV
表达系统	HEK293 Cells
标签	C-His
蛋白编号	P20895-1
别名	G Protein
蛋白构建	A DNA sequence encoding the human respiratory syncytial virus (RSV) (subtype A, strain Long) glycoprotein G (P20895-1) (His67-Gln298) was expressed with a polyhistidine tag at the C-terminus. Predicted N terminal: Ser
蛋白纯度	> 95 % as determined by SDS-PAGE.
分子量	27 kDa (predicted); 45-116 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	Human respiratory syncytial virus (HRSV) is the most common etiological agent of acute lower respiratory tract disease in infants and can cause repeated infections throughout life. It is classified within the genus pneumovirus of the family paramyxoviridae. Like other members of the family, HRSV has two major surface glycoproteins (G and F) that play important roles in the initial stages of the infectious cycle. HRSV G protein is a type II glycoprotein of 289-299 amino acids (depending on the virus strain) with a signal/anchor hydrophobic domain and is extensively modified by the addition of both N-and O-linked oligosaccharides to achieve the mature form of 8-9 kDa. The C-terminal ectodomain of the G protein has a central region and four cysteines which are conserved in all HRSV isolates and have been proposed as the putative receptor binding site. The G protein mediates attachment of the virus to the host cell membrane by interacting with heparan sulfate, initiating the infection. As similar to mucins in amino acid compositions, the RSV G protein can interact with host CX3CR1, the receptor for the CX3C chemokine fractalkine, and thus modulates the immune response and facilitate infection. Secreted glycoprotein G helps RSV escape antibody-dependent restriction of replication by acting as an antigen decoy and by modulating the activity of leukocytes bearing Fcgamma receptors. Unlike the other paramyxovirus attachment proteins, HRSV-G lacks both neuraminidase and hemagglutinating activities.