膜杰作
Star Staining
分子别名（Synonym）
HLA-A*0201 & B2M & PRAME (SLLQHLIGL)
表达区间及表达系统（Source）
Human HLA-A*02:01&B2M&PRAME (SLLQHLIGL) Tetramer Protein (HLE-H52H9) is expressed from human 293 cells (HEK293). It contains AA Ile 21 - Met 119 (B2M) & Gly 25 - Ile 308 (HLA-A*02:01) & SLLQHLIGL peptide (Accession # P61769 (B2M) & AAA59606.1 (HLA-A*02:01) & SLLQHLIGL).
蛋白结构（Molecular Characterization）
Human HLA-A*02:01&B2M&PRAME (SLLQHLIGL) Tetramer Protein is assembled by biotinylated monomer (HLE-H82E8) and streptavidin.
Biotinylated Human HLA-A*02:01&B2M&PRAME (SLLQHLIGL) Complex Protein is produced by co-expression of HLA and B2M loaded with PRAME peptide. Biotinylated Human HLA-A*02:01&B2M&PRAME (SLLQHLIGL) Complex Protein carries a polyhistidine tag at the C-terminus, followed by an Avi tag (Avitag™).
The protein has a calculated MW of 51.3 kDa and 13.8 kDa. The protein migrates as 55-60 kDa and 12 kDa when calibrated against Star Ribbon Pre-stained Protein Marker 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&PRAME (SLLQHLIGL) 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% (With Star Ribbon Pre-stained Protein Marker).
SEC-MALS
The purity of Human HLA-A*02:01&B2M&PRAME (SLLQHLIGL) Tetramer Protein (Cat. No. HLE-H52H9) is more than 90% and the molecular weight of this protein is around 270-295 kDa verified by SEC-MALS.
Report
活性（Bioactivity）-ELISA
Immobilized Human HLA-A*02:01&B2M&PRAME (SLLQHLIGL) Tetramer Protein (Cat. No. HLE-H52H9) at 1 μg/mL (100 μL/well) can bind Anti-B2M Antibody, Human IgG1 with a linear range of 0.06-2 ng/mL (QC tested).
Protocol
背景（Background）
This gene encodes an antigen that is preferentially expressed in human melanomas and that is recognized by cytolytic T lymphocytes. It is not expressed in normal tissues, except testis. The encoded protein acts as a repressor of retinoic acid receptor, and likely confers a growth advantage to cancer cells via this function. Alternative splicing results in multiple transcript variants. The PRAME (SLLQHLIGL) was shown to be recognized by HLA-A*0201 tumor-infiltrating lymphocytes from melanoma patients, and therefore it is widely been studied in TCR-T studies. The Human HLA-A*0201 PRAME (SLLQHLIGL) complex protein is a complex of HLA-A*0201 of the MHC Class I, B2M and PRAME (SLLQHLIGL) peptide.
