{"product_id":"recombinant-human-hla-class-ii-histocompatibility-antigen-drb1-1-beta-chainhla-drb1-partial-1","title":"Recombinant Human HLA class II histocompatibility antigen, DRB1-1 beta chain(HLA-DRB1),partial","description":"\u003cp\u003e\u003cb\u003eSize\u003c\/b\u003e: 200ug. Other sizes are also available. Please Inquire.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eIn Stock\u003c\/b\u003e: Yes\u003c\/p\u003e\u003cp\u003e\u003cb\u003eLead time\u003c\/b\u003e: 3-7 working days\u003c\/p\u003e\u003cp\u003e\u003cb\u003eResearch Topic\u003c\/b\u003e: Immunology\u003c\/p\u003e\u003cp\u003e\u003cb\u003eUniprot ID\u003c\/b\u003e: P04229\u003c\/p\u003e\u003cp\u003e\u003cb\u003eGene Names\u003c\/b\u003e: HLA-DRB1\u003c\/p\u003e\u003cp\u003e\u003cb\u003eOrganism\u003c\/b\u003e: Homo sapiens (Human) \u003c\/p\u003e\u003cp\u003e\u003cb\u003eAA Sequence\u003c\/b\u003e: GDTRPRFLWQLKFECHFFNGTERVRLLERCIYNQEESVRFDSDVGEYRAVTELGRPDAEYWNSQKDLLEQRRAAVDTYCRHNYGVGESFTVQRRVEPKVTVYPSKTQPLQHHNLLVCSVSGFYPGSIEVRWFRNGQEEKAGVVSTGLIQNGDWTFQTLVMLETVPRSGEVYTCQVEHPSVTSPLTVEWRARSESAQSK\u003c\/p\u003e\u003cp\u003e\u003cb\u003eExpression Region\u003c\/b\u003e: 30-227aa\u003c\/p\u003e\u003cp\u003e\u003cb\u003eSequence Info\u003c\/b\u003e: Extracellular Domain\u003c\/p\u003e\u003cp\u003e\u003cb\u003eSource\u003c\/b\u003e: E.coli\u003c\/p\u003e\u003cp\u003e\u003cb\u003eTag Info\u003c\/b\u003e: N-terminal 10xHis-SUMO-tagged and C-terminal Myc-tagged\u003c\/p\u003e\u003cp\u003e\u003cb\u003eMW\u003c\/b\u003e: 42.9 kDa\u003c\/p\u003e\u003cp\u003e\u003cb\u003eAlternative Name(s)\u003c\/b\u003e: MHC class II antigen DRB1*1\u003c\/p\u003e\u003cp\u003e\u003cb\u003eRelevance\u003c\/b\u003e: 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.\n(Microbial infection) Acts as a receptor for Epstein-Barr virus on lymphocytes.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eReference\u003c\/b\u003e: \"DO beta: a new beta chain gene in HLA-D with a distinct regulation of expression.\"Tonnelle C., Demars R., Long E.O.EMBO J4:2839-2847(1985)\u003c\/p\u003e\u003cp\u003e\u003cb\u003ePurity\u003c\/b\u003e: Greater than 90% as determined by SDS-PAGE.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eStorage Buffer\u003c\/b\u003e: Tris-based buffer，50% glycerol \u003c\/p\u003e\u003cp\u003e\u003cb\u003eStorage\u003c\/b\u003e: The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself. \nGenerally, the shelf life of liquid form is 6 months at -20℃\/-80℃. The shelf life of lyophilized form is 12 months at -20℃\/-80℃.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eNotes\u003c\/b\u003e: Repeated freezing and thawing is not recommended. Store working aliquots at 4℃ for up to one week.\u003c\/p\u003e","brand":"Gene Bio Systems","offers":[{"title":"Default Title","offer_id":39767685726308,"sku":"CSB-EP361230HU","price":992.6,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/8588\/9636\/products\/no_image_default_image-jpeg_9691b5b9-d509-48ed-ba4e-64b4628dd457.jpg?v=1659194487","url":"https:\/\/www.genebiosystems.com\/products\/recombinant-human-hla-class-ii-histocompatibility-antigen-drb1-1-beta-chainhla-drb1-partial-1","provider":"GeneBio ","version":"1.0","type":"link"}