HLA-DQB2 antibody (C-Term)

Catalog No. ABIN6262289

Product Details anti-HLA-DQB2 Antibody

Target: HLA-DQB2 (Major Histocompatibility Complex, Class II, DQ beta 2 (HLA-DQB2))

Binding Specificity: C-Term

Reactivity: Human

Host: Rabbit

Clonality: Polyclonal

Conjugate: This HLA-DQB2 antibody is un-conjugated

Application: Western Blotting (WB), ELISA

Specificity: HLA-DQB2 Antibody detects endogenous levels of total HLA-DQB2.

Purification: The antiserum was purified by peptide affinity chromatography using SulfoLink^TM Coupling Resin (Thermo Fisher Scientific).

Immunogen: A synthesized peptide derived from human HLA-DQB2, corresponding to a region within C-terminal amino acids.

Isotype: IgG

Application Details

Application Notes: WB 1:1000-3000, ELISA(peptide) 1:20000-1:40000

Restrictions: For Research Use only

Handling

Format: Liquid

Concentration: 1 mg/mL

Buffer: Rabbit IgG in phosphate buffered saline , pH 7.4, 150 mM NaCl, 0.02 % sodium azide and 50 % glycerol.

Preservative: Sodium azide

Precaution of Use: This product contains Sodium azide: a POISONOUS AND HAZARDOUS SUBSTANCE which should be handled by trained staff only.

Storage: -20 °C

Storage Comment: Store at -20 °C. Stable for 12 months from date of receipt.

Expiry Date: 12 months

Target Details for HLA-DQB2

Target: HLA-DQB2 (Major Histocompatibility Complex, Class II, DQ beta 2 (HLA-DQB2))

Alternative Name: HLA-DQB2 (HLA-DQB2 Products)

Synonyms: HLA-DQB1 antibody, HLA-DXB antibody, major histocompatibility complex, class II, DQ beta 2 antibody, HLA-DQB2 antibody

Background:

Description: 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.

Gene: HLA-DQB2

Molecular Weight: 30 kDa

Gene ID: 3120

UniProt: P05538

Pathways: TCR Signaling