Recombinant Human HLA class II histocompatibility antigen, DQ alpha 2 chain (HLA-DQA2), partial

SKU:BHP10502069
Overview
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Recombinant HLA-DQA2 Human protein produced in E. coli, N-terminal 6xHis-tagged spanning 24-214aa. Suitable for binding assays, functional studies, and assay development.
Expression System E. coli
Tag N-terminal 6xHis-tagged
Purity Greater
Species Human
Molecular Weight 25.6 kDa
Options selector
Catalog no. Size
CSB-RP148294h-1MG 1 mg
CSB-RP148294h-100UG 100 ug
CSB-RP148294h-20UG 20 ug
Available Options

Select the variant that best fits your experiment. Availability and lead time may vary by option.

  • Options: Size (3) - 1 mg, 100 ug, 20 ug
  • Lead time: Made to Order — production begins after purchase. Lead time is typically 13-23 business days.
  • Storage: The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself. Generally, the shelf life of liquid form is 6 months at -20℃/-80℃. The shelf life of lyophilized form is 12 months at -20℃/-80℃.
  • Shipping: cold-chain shipment (typically with ice packs).
  • Upon receipt: store at recommended temperature as soon as possible.
  • Sales terms and conditions: Please review prior to ordering.
Field Specification
Mfr No CSB-RP148294h
Activity
  • Not Test
Alternative Names DX alpha chainHLA class II histocompatibility antigen, DQ(6) alpha chainHLA-DQA1MHC class II DQA2
Endotoxin Level Not test
Expression System
  • E. coli
Form Liquid or Lyophilized powder
Function
  • Binds peptides derived from antigens that access the endocytic route of antigen presenting cells (APC) and presents them on the cell surface for recognition by the CD4 T-cells. The peptide binding cleft accommodates peptides of 10-30 residues. The peptides presented by MHC class II molecules are generated mostly by degradation of proteins that access the endocytic route
  • where they are processed by lysosomal proteases and other hydrolases. Exogenous antigens that have been endocytosed by the APC are thus readily available for presentation via MHC II molecules
  • and for this reason this antigen presentation pathway is usually referred to as exogenous. As membrane proteins on their way to degradation in lysosomes as part of their normal turn-over are also contained in the endosomal/lysosomal compartments
  • exogenous antigens must compete with those derived from endogenous components. Autophagy is also a source of endogenous peptides
  • autophagosomes constitutively fuse with MHC class II loading compartments. In addition to APCs
  • other cells of the gastrointestinal tract
  • such as epithelial cells
  • express MHC class II molecules and CD74 and act as APCs
  • which is an unusual trait of the GI tract. To produce a MHC class II molecule that presents an antigen
  • three MHC class II molecules (heterodimers of an alpha and a beta chain) associate with a CD74 trimer in the ER to form a heterononamer. Soon after the entry of this complex into the endosomal/lysosomal system where antigen processing occurs
  • CD74 undergoes a sequential degradation by various proteases
  • including CTSS and CTSL
  • leaving a small fragment termed CLIP (class-II-associated invariant chain peptide). The removal of CLIP is facilitated by HLA-DM via direct binding to the alpha-beta-CLIP complex so that CLIP is released. HLA-DM stabilizes MHC class II molecules until primary high affinity antigenic peptides are bound. The MHC II molecule bound to a peptide is then transported to the cell membrane surface. In B-cells
  • the interaction between HLA-DM and MHC class II molecules is regulated by HLA-DO. Primary dendritic cells (DCs) also to express HLA-DO. Lysosomal microenvironment has been implicated in the regulation of antigen loading into MHC II molecules
  • increased acidification produces increased proteolysis and efficient peptide loading.
Molecular Weight 25.6 kDa
Product Type
  • Recombinant Protein
Purity Greater than 90% as determined by SDS-PAGE.
Reconstitution We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20℃/-80℃. Our default final concentration of glycerol is 50%. Customers could use it as reference.
Species Homo sapiens (Human)
Storage The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself. Generally, the shelf life of liquid form is 6 months at -20℃/-80℃. The shelf life of lyophilized form is 12 months at -20℃/-80℃.
UniProt # P01906

Scientific Background

Binds peptides derived from antigens that access the endocytic route of antigen presenting cells (APC) and presents th on the cell surface for recognition by the CD4 T-cells. The peptide binding cleft accommodates peptides of 10-30 residues. The peptides presented by MHC class II molecules are generated mostly by degradation of proteins that access the endocytic route, where they are processed by lysosomal proteases and other hydrolases.

Product Description

E. coli Expression

Recombinant Human HLA class II histocompatibility antigen, DQ alpha 2 chain (HLA-DQA2), partial is a recombinant protein expressed in E. coli and purified to Greater than 90% as determined by SDS-PAGE. as determined by SDS-PAGE. Supplied as Liquid or Lyophilized powder, n-terminal 6xhis-tagged. For research use only.

We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20℃/-80℃. Our default final concentration of glycerol is 50%. Customers could use it as reference.

Protein Specifications

Molecular Weight 25.6 kDa
Expression Region 24-214aa
Expression System E. coli
Tag N-terminal 6xHis-tagged
Purity Greater than 90% as determined by SDS-PAGE.
Form Liquid or Lyophilized powder
Storage Buffer If the delivery form is liquid, the default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol. If the delivery form is lyophilized powder, the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.
Endotoxin Level Not test
UniProt Accession P01906
Storage The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself. Generally, the shelf life of liquid form is 6 months at -20℃/-80℃. The shelf life of lyophilized form is 12 months at -20℃/-80℃.

Safety & Handling

For Research Use Only (RUO). Not intended for diagnostic or therapeutic use. Handle as potentially biohazardous material. Follow your institution's biosafety guidelines when working with recombinant proteins.

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What expression system was used to produce this protein?

This recombinant protein is expressed in E. coli, a widely used system for producing soluble, biologically active proteins at scale. The E. coli expression platform enables efficient folding and high yields, suitable for functional and binding assays.

What is the tag and purity of this product?

This protein is supplied as N-terminal 6xHis-tagged and has been purified to Greater than 90% as determined by SDS-PAGE. as determined by SDS-PAGE. High purity minimizes interference in downstream assays, particularly in cell-based bioactivity studies and ELISA development.

How should I reconstitute and store this product?

Briefly centrifuge the vial before opening. Reconstitute in sterile deionized water to 0.1–1.0 mg/mL. For long-term storage, add 5–50% glycerol and store in aliquots at -20°C or -80°C to avoid repeated freeze-thaw cycles. The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself. Generally, the shelf life of liquid form is 6 months at -20℃/-80℃. The shelf life of lyophilized form is 12 months at -20℃/-80℃.

Is this protein biologically active?

Biological activity data are available in the product datasheet. Please contact our support team for activity specifications relevant to your specific application.

What applications is this recombinant protein suitable for?

This recombinant protein is suitable for a range of in vitro research applications including binding assays, protein–protein interaction studies, cell proliferation/bioactivity assays, ELISA standard curve calibration, and assay development. Confirm suitability for your specific assay conditions with the product datasheet.

We offer flexible ordering options including bulk quantities, custom formulations, and endotoxin removal services for many of our recombinant proteins. Lead times and minimum order quantities vary by product. For custom conjugation, specialized buffer formulations, or volume pricing, please contact our support team. All customization requests are handled in partnership with our manufacturing suppliers and are subject to feasibility review.

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