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蛋白名称：SARS-CoV-2 XD(BA.1 x AY.4) Spike S1+S2 trimer Protein (ECD, His Tag)
蛋白构建：A DNA sequence encoding the SARS-CoV-2 XD(BA.1 x AY.4) Spike S1+S2 trimer (YP_009724390.1, with mutations T19R, A27S, T95I, G142D, EFR156G, NL211I, Ins214EPE, G339D, S371L, S373P, S375F, K417N, N440K, G446S, S477N, T478K, E484A, Q493R, G496S, Q498R, N501Y, Y505H, T547K, D614G, H655Y, N679K, P681H, N764K, D796Y, F817P, N856K, A892P, A899P, A942P, Q954H, N969K, L981F, K986P, V987P and furin cleavage site mutants) expressed with the bacteriophage T4 fibritin and a polyhistidine tag at the C-terminus. The mutations were identified in the SARS-CoV-2 variant (known as variant XD(BA.1 x AY.4)).
表达宿主：HEK293 Cells
蛋白纯度：> 90 % as determined by SDS-PAGE.
蛋白活性：Immobilized ACE2 Protein, Human, Recombinant (mFc Tag)(Cat:10108-H05H) at 2 μg/mL (100 μL/well) can bind SARS-CoV-2 XD(BA.1 x AY.4) Spike S1+S2 trimer Protein (ECD, His Tag)(Cat:40589-V08H30), the EC50 is 4-15ng/mL.
蛋白内毒素：< 1.0 EU per μg protein as determined by the LAL method.
预测N端：Val 16
蛋白分子量：The recombinant SARS-CoV-2 XD(BA.1 x AY.4) Spike S1+S2 consists of 1234 amino acids and predicts a molecular mass of 137.32 kDa.
蛋白NP号：YP_009724390.1
蛋白氨基酸序列：Met1-Gln1208
蛋白标签：C-His
蛋白保存条件：Samples are stable for up to twelve months from date of receipt at -20℃ to -80℃. Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
蛋白名称：SARS-CoV-2 XD(BA.1 x AY.4) Spike S1+S2 trimer Protein (ECD, His Tag)
蛋白构建：A DNA sequence encoding the SARS-CoV-2 XD(BA.1 x AY.4) Spike S1+S2 trimer (YP_009724390.1, with mutations T19R, A27S, T95I, G142D, EFR156G, NL211I, Ins214EPE, G339D, S371L, S373P, S375F, K417N, N440K, G446S, S477N, T478K, E484A, Q493R, G496S, Q498R, N501Y, Y505H, T547K, D614G, H655Y, N679K, P681H, N764K, D796Y, F817P, N856K, A892P, A899P, A942P, Q954H, N969K, L981F, K986P, V987P and furin cleavage site mutants) expressed with the bacteriophage T4 fibritin and a polyhistidine tag at the C-terminus. The mutations were identified in the SARS-CoV-2 variant (known as variant XD(BA.1 x AY.4)).
表达宿主：HEK293 Cells
蛋白纯度：> 90 % as determined by SDS-PAGE.
蛋白活性：Immobilized ACE2 Protein, Human, Recombinant (mFc Tag)(Cat:10108-H05H) at 2 μg/mL (100 μL/well) can bind SARS-CoV-2 XD(BA.1 x AY.4) Spike S1+S2 trimer Protein (ECD, His Tag)(Cat:40589-V08H30), the EC50 is 4-15ng/mL.
蛋白内毒素：< 1.0 EU per μg protein as determined by the LAL method.
预测N端：Val 16
蛋白分子量：The recombinant SARS-CoV-2 XD(BA.1 x AY.4) Spike S1+S2 consists of 1234 amino acids and predicts a molecular mass of 137.32 kDa.
蛋白NP号：YP_009724390.1
蛋白氨基酸序列：Met1-Gln1208
蛋白标签：C-His
蛋白保存条件：Samples are stable for up to twelve months from date of receipt at -20℃ to -80℃. Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
北京义翘神州科技股份有限公司（简称：义翘神州，品牌：Sino Biological）于2021年8月16日成功登陆深圳证券交易所创业板（股票代码：301047），是一家从事生物试剂研发、生产、销售并提供技术服务的生物科技公司，主要业务包括重组蛋白、抗体、基因和培养基等产品，以及重组蛋白、抗体的开发和生物分析检测等服务。
义翘神州为全球的药品研发企业和生命科学研究机构提供高质量的生物试剂产品和高水平的技术服务，能够覆盖生命科学研究的多个领域，为分子生物学、细胞生物学、免疫学、发育生物学、干细胞研究等基础科研方向和创新药物研发提供“一站式”生物试剂产品和技术服务。客户涵盖大学、科研院所、医药研发企业等国内外各类生物研发单位。目前公司已经在美国、欧洲等地建立了子公司，在上海建立分公司，已成为生物试剂行业国内领先的科技公司之一。
凭借多年病毒蛋白研究技术优势，义翘神州仅用35天就成功表达出新冠病毒重要靶点受体结合域蛋白。为了更好的支持新冠病毒研究，义翘神州已开发生产近百种新冠病毒相关科研试剂，包括重要靶点抗原蛋白、中和抗体、抗原蛋白检测试剂盒等。义翘神州还可以提供新冠假病毒中和检测服务，可用于筛选出具有中和活性的抗体或血清，支持在细胞水平上的评估。目前，这些科研试剂已被全球数百家研究机构用于疫苗和抗体开发及基础机制研究。