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分子别名（Synonym）
FcRn,FCGRT & B2M
表达区间及表达系统（Source）
Biotinylated Mouse FCGRT&B2M Heterodimer Protein, His,Avitag (FCM-M82W5) is expressed from human 293 cells (HEK293). It contains AA Ser 22 - Ser 297 (FCGRT) & Ile 21 - Met 119 (B2M) (Accession # Q61559-1(FCGRT) & P01887-1(B2M)).
Predicted N-terminus: Ser 22 (FCGRT) & Ile 21 (B2M)
Request for sequence
蛋白结构（Molecular Characterization）
Biotinylated Mouse FCGRT&B2M Heterodimer Protein, His,Avitag, produced by co-expression of FCGRT and B2M, has a calculated MW of 34.9 kDa (FCGRT) and 11.6 kDa (B2M). Subunit FCGRT is fused with a polyhistidine tag at the C-terminus , followed by an Avi tag (Avitag™) and subunit Beta-2 microglobulin (B2M) contains no tag at the C-terminus. The reducing (R) protein migrates as 45-55 kDa (FCGRT) and 13 kDa (B2M) respectively due to glycosylation.
标记（Biotinylation）
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（Biotin: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 PBS, pH7.4. Normally trehalose is added as protectant before lyophilization.
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.
产品数据图
电泳（SDS-PAGE）
Biotinylated Mouse FCGRT&B2M Heterodimer Protein, His,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 Mouse FCGRT&B2M Heterodimer Protein, His,Avitag (Cat. No. FCM-M82W5) is more than 90% and the molecular weight of this protein is around 55-65 kDa verified by SEC-MALS.
Report
活性（Bioactivity）-ELISA
Immobilized Ipilimumab at 5 μg/mL (100 μL/well) can bind Biotinylated Mouse FCGRT&B2M Heterodimer Protein, His,Avitag (Cat. No. FCM-M82W5) with a linear range of 5-78 ng/mL (QC tested).
Protocol
活性（Bioactivity）-SPR
Biotinylated Mouse FCGRT&B2M Heterodimer Protein, His,Avitag (Cat. No. FCM-M82W5) captured on Biotin CAP-Series S Sensor Chip can bind Herceptin with an affinity constant of 3.42 nM as determined in a SPR assay (Biacore 8K) (Routinely tested).
Protocol
Biotinylated Mouse FCGRT&B2M Heterodimer Protein, His,Avitag (Cat. No. FCM-M82W5) captured on Biotin CAP-Series S Sensor Chip can bind Monoclonal Anti-Human CD3 Antibody, Mouse IgG2a (Clone: OKT3), premium grade (Cat. No. CDE-M120a) with an affinity constant of 4.57 nM as determined in a SPR assay (Biacore 8K) (Routinely tested).
Protocol
活性（Bioactivity）-BLI
Loaded Biotinylated Mouse FCGRT&B2M Heterodimer Protein, His,Avitag (Cat. No. FCM-M82W5) on SA Biosensor, can bind Herceptin with an affinity constant of 2.2 nM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).
Protocol
Loaded Biotinylated Mouse FCGRT&B2M Heterodimer Protein, His,Avitag (Cat. No. FCM-M82W5) on SA Biosensor, can bind Mouse Serum Albumin, His Tag (Cat. No. MSA-M52H8) with an affinity constant of 0.495 μM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).
Protocol
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背景
FCGRT & B2M heterodimer protein (FcRn complex) consist of two subunits: p51 (equivalent to FCGRT), and p14 (equivalent to beta-2-microglobulin), and forms an MHC class I-like heterodimer. Fc fragment of IgG, receptor, transporter, alpha (FCGRT) binds to the Fc region of monomeric immunoglobulins gamma and mediates the uptake of IgG from milk. FCGRT possible role in transfer of immunoglobulin G from mother to fetus. Beta-2-microglobulin (B2M) is a component of the class I major histocompatibility complex (MHC) and involved in the presentation of peptide antigens to the immune system.
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