膜杰作
Star Staining
分子别名（Synonym）
IgG1
表达区间及表达系统（Source）
Biotinylated Human IgG1 Fc, Avitag (IG1-H8213) is expressed from human 293 cells (HEK293). It contains AA Glu 99 - Lys 330 (Accession # P01857-1 ).
Predicted N-terminus: Glu 99
Request for sequence
蛋白结构（Molecular Characterization）
This protein carries an Avi tag (Avitag™) at the C-terminus.
The protein has a calculated MW of 28.4 kDa. The protein migrates as 32-34 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.
内毒素（Endotoxin）
Less than 1.0 EU per μg by the LAL method.
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 Tris with Glycine, Arginine and NaCl, pH7.5 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:
- -20°C to -70°C for 12 months in lyophilized state;
- -70°C for 3 months under sterile conditions after reconstitution.
质量管理控制体系（QMS）
电泳（SDS-PAGE）
Biotinylated Human IgG1 Fc, Avitag on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 95%.
SEC-MALS
The purity of Biotinylated Human IgG1 Fc, Avitag (Cat. No. IG1-H8213) is more than 90% and the molecular weight of this protein is around 55-74 kDa verified by SEC-MALS.
Report
活性（Bioactivity）-ELISA
Immobilized Recombinant Protein G, His Tag (Cat. No. RPG-S3140) at 2 μg/mL (100 μL/well) can bind Biotinylated Human IgG1 Fc, Avitag (Cat. No. IG1-H8213) with a linear range of 0.013-0.512 μg/mL (Routinely tested).
Protocol
活性（Bioactivity）-SPR
Human FCGRT&B2M Heterodimer Protein, His Tag (SPR & BLI verified) (Cat. No. FCN-H52W7) captured on CM5 Chip via anti-His antibody can bind Biotinylated Human IgG1 Fc, Avitag (Cat. No. IG1-H8213) with an affinity constant of 0.377 μM as determined in SPR assay (Biacore 8K) (QC tested).
Protocol
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背景（Background）
Crystallizable fragments composed of the carboxy-terminal halves of both IMMUNOGLOBULIN HEAVY CHAINS linked to each other by disulfide bonds. Fc fragments contain the carboxy-terminal parts of the heavy chain constant regions that are responsible for the effector functions of an immunoglobulin (COMPLEMENT fixation, binding to the cell membrane via FC RECEPTORS, and placental transport). IgG1 Fc was reported has a novel role as a potential anti-inflammatory drug for treatment of human autoimmune diseases.
