重组新冠病毒 Spike S1+S2 trimer 蛋白 (ECD, His & AVI标签), 生物素标记（产品说明）
蛋白名称：Recombinant SARS-CoV-2 S1+S2 trimer Protein(ECD, His & AVI Tag), Biotinylated

蛋白构建：A DNA sequence encoding the SARS-CoV-2 Spike S1+S2 (YP_009724390.1, with mutations D614G,F817P, A892P, A899P,A942P, K986P, V987P and furin cleavage site mutants) was expressed with bacteriophage T4 fibritin and a C-terminal polyhistidine tagged AVI tag at the C-terminus. The expressed protein was biotinylated in vivo by the Biotin-Protein ligase (BirA enzyme) which is co-expressed.

表达宿主：HEK293 Cells

蛋白纯度：> 90 % as determined by SDS-PAGE. > 95 % as determined by SEC-HPLC.

蛋白活性：Immobilized human ACE2 protein (mFc tag)(Cat:10108-H05H) at 2 μg/mL (100 μL/well) can bind SARS-CoV-2 Spike S1+S2 trimer Protein (ECD, His & AVI Tag), Biotinylated(Cat:40589-V49H-B), the EC50 is 10-48 ng/mL.

蛋白内毒素：< 1.0 EU per μg protein as determined by the LAL method.

蛋白标签：C-His-AVI