膜杰作
Star Staining
分子别名（Synonym）
HLA-E*0103 & B2M & CMV UL40 (VMAPRTVLL)
表达区间及表达系统（Source）
PE-Labeled Human HLA-E*01:03&B2M&CMV UL40 (VMAPRTVLL) Tetramer Protein (HLU-HP2H5) is expressed from human 293 cells (HEK293). It contains AA Gly 22 - Ile 305 (HLA-E*01:03) & Ile 21 - Met 119 (B2M) & VMAPRTVLL peptide (Accession # P13747 (HLA-E*01:03) & P61769-1 (B2M) & VMAPRTVLL).
Predicted N-terminus: Gly 22 & Val
Request for sequence
蛋白结构（Molecular Characterization）
PE-Labeled Human HLA-E*01:03&B2M&CMV UL40 (VMAPRTVLL) Tetramer Protein is assembled by biotinylated monomer (HL0-H82E7) and PE-labeled streptavidin.
Biotinylated Human HLA-E*01:03&B2M&CMV UL40 (VMAPRTVLL) Complex Protein is produced by co-expression of HLA and B2M loaded with CMV UL40 peptide. Biotinylated Human HLA-E*01:03&B2M&CMV UL40 (VMAPRTVLL) Complex Protein carries a polyhistidine tag at the C-terminus, followed by an Avi tag (Avitag™).
偶联（Conjugate）
PE
Excitation Wavelength: 488 nm / 561 nm
Emission Wavelength: 575 nm
内毒素（Endotoxin）
Less than 1.0 EU per μg by the LAL method.
制剂（Formulation）
Lyophilized from 0.22 μm filtered solution in PBS, 1% BSA, 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 protect from light and 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.
活性（Bioactivity）-ELISA
Immobilized Human NKG2C&CD94, Fc Tag (Cat. No. NC4-H5258) at 5 μg/mL (100 μL/well) can bind PE-Labeled Human HLA-E*01:03&B2M&CMV UL40 (VMAPRTVLL) Tetramer Protein (Cat. No. HLU-HP2H5) with a linear range of 0.01-5 μg/mL (QC tested).
Protocol
背景（Background）
HLA-E belongs to the HLA class I heavy chain paralogues. This class I molecule is a heterodimer consisting of a heavy chain and a light chain (beta-2 microglobulin). The heavy chain is anchored in the membrane. HLA-E binds a restricted subset of peptides derived from the leader peptides of other class I molecules. The heavy chain is approximately 45 kDa and its gene contains 8 exons. Exon one encodes the leader peptide, exons 2 and 3 encode the alpha1 and alpha2 domains, which both bind the peptide, exon 4 encodes the alpha3 domain, exon 5 encodes the transmembrane region, and exons 6 and 7 encode the cytoplasmic tail.
