Biotinylated SARS-CoV-2 Spike NTD Protein, His,Avitag™ (BA.2/Omicron) (MALS verified)

分子别名（Synonym）

S1 protein NTD,Spike protein S1 NTD,BetaCoV S1-NTD

表达区间及表达系统（Source）

Biotinylated SARS-CoV-2 Spike NTD, His,Avitag (BA.2/Omicron) (SPD-C82H5) is expressed from human 293 cells (HEK293). It contains AA Ser 13 - Leu 303 (Accession # QHD43416.1 (T19I, LPP24-26del, A27S, G142D, V213G)). The spike mutations are identified on the SARS-CoV-2 Omicron variant (Pango lineage: BA.2; GISAID clade: GRA; Nextstrain clade: 21L).

Predicted N-terminus: Ser 13

蛋白结构（Molecular Characterization）

This protein carries a polyhistidine tag at the C-terminus, followed by an Avi tag (Avitag™).

The protein has a calculated MW of 36.3 kDa. The protein migrates as 60-66 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

标记（Labeling）

Biotinylation of this product is performed using Avitag™ technology. Briefly, the single lysine residue in the Avitag is enzymatically labeled with biotin.

蛋白标记度（Protein Ratio）

Passed as determined by the HABA assay / binding ELISA.

纯度（Purity）

>95% as determined by SDS-PAGE.

>90% as determined by SEC-MALS.

制剂（Formulation）

Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 with trehalose as protectant.

Contact us for customized product form or formulation.

重构方法（Reconstitution）

Please see Certificate of Analysis for specific instructions.

For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.

存储（Storage）

For long term storage, the product should be stored at lyophilized state at -20°C or lower.

Please avoid repeated freeze-thaw cycles.

This product is stable after storage at:

1. -20°C to -70°C for 12 months in lyophilized state;
2. -70°C for 3 months under sterile conditions after reconstitution.

质量管理控制体系（QMS）

1. 质量管理体系（ISO, GMP）
2. 质量优势
3. 质控流程