膜杰作
Star Staining
分子别名（Synonym）
HLA-A*02:01 & B2M & MAGE-A4 (KVLEHVVRV)
表达区间及表达系统（Source）
Human HLA-A*02:01&B2M&MAGE-A4 (KVLEHVVRV) Tetramer Protein (HLK-H52E5) is expressed from human 293 cells (HEK293). It contains AA Gly 25 - Ile 308 (HLA-A*02:01) & Ile 21 - Met 119 (B2M) & KVLEHVVRV peptide (Accession # AAA59606.1 (HLA-A*02:01) & P61769-1 (B2M) & KVLEHVVRV).
Predicted N-terminus: Gly 25 & Ile 21
Request for sequence
蛋白结构（Molecular Characterization）
Human HLA-A*02:01&B2M&MAGE-A4 (KVLEHVVRV) Tetramer Protein is assembled by biotinylated monomer and streptavidin.
Biotinylated Human HLA-A*02:01&B2M&MAGE-A4 (KVLEHVVRV) Complex Protein is produced by co-expression of HLA and B2M loaded with MAGE-A4 peptide. Biotinylated Human HLA-A*02:01&B2M&MAGE-A4 (KVLEHVVRV) Complex 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, 13.3 kDa and 11.7 kDa. The protein migrates as 40-45 kDa, 15 kDa and 13 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.
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 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.
电泳（SDS-PAGE）
Human HLA-A*02:01&B2M&MAGE-A4 (KVLEHVVRV) Tetramer Protein 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 Human HLA-A*02:01&B2M&MAGE-A4 (KVLEHVVRV) Tetramer Protein (Cat. No. HLK-H52E5) is more than 90% and the molecular weight of this protein is around 230-270 kDa verified by SEC-MALS.
Report
活性（Bioactivity）-ELISA
Immobilized Human HLA-A*02:01&B2M&MAGE-A4 (KVLEHVVRV) Tetramer Protein (Cat. No. HLK-H52E5) at 1 μg/mL (100 μL/well) can bind Anti-B2M Antibody, Human IgG1 with a linear range of 0.06-2 ng/mL (Routinely tested).
Protocol
背景（Background）
The MAGE A4 antigen is a cancer-testis antigen and is expressed intracellularly in various solid tumor tissues, MAGE A4230-239 peptide (GVYDGREHTV) is a cytotoxic T lymphocyte (CTL) epitope presented by HLA-A2 The Human HLA-A*0201 MAGE-A4 (GVYDGREHTV) complex protein is a complex of HLA-A*0201 of the MHC Class I, B2M, and GVYDGREHTV peptide of the MAGE-A4.
