Mouse anti-Human HLA Class 1 Antigen A11 Monoclonal Antibody

Anti-Human HLA Class 1 Antigen A11 (Biotin)

Cat. Num. AAA601360

• Reactivity: Human
• Applications: Flow Cytometry
• Purity: Purified by Ion Exchange chromatography
• Synonyms: HLA Class 1 Antigen A11; Monoclonal Antibody; Anti-Human HLA Class 1 Antigen A11 (Biotin); anti-HLA Class 1 Antigen A11 antibody

• Host: Mouse
• Reactivity: Human
• Clonality: Monoclonal
• Isotype: IgM
• Clone Number: 8.L.170
• Specificity: Recognizes human HLA Class 1 Antigen-A11.
• Purity/Purification: Purified by Ion Exchange chromatography
• Form/Format: Supplied as a liquid in PBS, 1% BSA, 0.09% sodium azide. Labeled with Biotin

• Applicable Applications for anti-HLA Class 1 Antigen A11 antibody: Flow Cytometry (FC)
• Application Notes: Other potential applications include Cell Typing, Tissue Staining and Chimerism Studies.; Optimal dilutions to be determined by the researcher.
• Grade: Highly Purified
• Immunogen: T cells expressing HLA class 1 antigen
• Preparation and Storage: May be stored at 4°C for short-term only.; Aliquot to avoid repeated freezing and thawing. Store at -20°C.; Aliquots are stable for up to 12 months after receipt.; For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.

Related Product Information for anti-HLA Class 1 Antigen A11 antibody

The human leukocyte antigen system (HLA) is the name of the major histocompatibility complex (MHC) in humans. The superlocus contains a large number of genes related to immune system function in humans. This group of genes resides on chromosome 6, and encodes cell-surface antigen-presenting proteins and many other genes. The HLA genes are the human versions of the MHC genes that are found in most vertebrates (and thus are the most studied of the MHC genes). The proteins encoded by certain genes are also known as antigens, as a result of their historic discovery as factors in organ transplantations. The major HLA antigens are essential elements for immune function. Different classes have different functions: HLA class I antigens (A, B & C) present peptides from inside the cell (including viral peptides if present). These peptides are produced from digested proteins that are broken down in the proteasomes. The peptides are generally small polymers, about 9 amino acids in length. Foreign antigens attract killer T-cells (also called CD8 positive- or cytotoxic T-cells) that destroy cells.

Product Categories/Family for anti-HLA Class 1 Antigen A11 antibody

Antibodies; Abs to HLA

NCBI and Uniprot Product Information

• NCBI GI #: 3205175
• NCBI Official Full Name: HLA-D class II antigen DR1 beta chain

NCBI Description

HLA-DRB1 belongs to the HLA class II beta chain paralogs. The class II molecule is a heterodimer consisting of an alpha (DRA) and a beta chain (DRB), both anchored in the membrane. It plays a central role in the immune system by presenting peptides derived from extracellular proteins. Class II molecules are expressed in antigen presenting cells (APC: B lymphocytes, dendritic cells, macrophages). The beta chain is approximately 26-28 kDa. It is encoded by 6 exons. Exon one encodes the leader peptide; exons 2 and 3 encode the two extracellular domains; exon 4 encodes the transmembrane domain; and exon 5 encodes the cytoplasmic tail. Within the DR molecule the beta chain contains all the polymorphisms specifying the peptide binding specificities. Hundreds of DRB1 alleles have been described and typing for these polymorphisms is routinely done for bone marrow and kidney transplantation. DRB1 is expressed at a level five times higher than its paralogs DRB3, DRB4 and DRB5. DRB1 is present in all individuals. Allelic variants of DRB1 are linked with either none or one of the genes DRB3, DRB4 and DRB5. There are 4 related pseudogenes: DRB2, DRB6, DRB7, DRB8 and DRB9. [provided by RefSeq, Jul 2008]

Uniprot Description

HLA-DRB1 iso2: 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 miroenvironment has been implicated in the regulation of antigen loading into MHC II molecules; increased acidification produces increased proteolysis and efficient peptide loading. Genetic variation in HLA-DRB1 is a cause of susceptibility to sarcoidosis type 1 (SS1). Sarcoidosis is an idiopathic, systemic, inflammatory disease characterized by the formation of immune granulomas in involved organs. Granulomas predominantly invade the lungs and the lymphatic system, but also skin, liver, spleen, eyes and other organs may be involved. Belongs to the MHC class II family.

Protein type: Membrane protein, integral

Chromosomal Location of Human Ortholog: 6p21.3

Cellular Component: Golgi membrane; cell surface; membrane; integral to plasma membrane; late endosome membrane; lysosomal membrane; plasma membrane; trans-Golgi network membrane; external side of plasma membrane; MHC class II protein complex

Molecular Function: MHC class II receptor activity; peptide antigen binding

Biological Process: T-helper 1 type immune response; detection of bacterium; cytokine and chemokine mediated signaling pathway; antigen processing and presentation of exogenous peptide antigen via MHC class II; immunoglobulin production during immune response; T cell receptor signaling pathway; polysaccharide assembly with MHC class II protein complex; humoral immune response mediated by circulating immunoglobulin; negative regulation of T cell proliferation; inflammatory response to antigenic stimulus; peptide antigen assembly with MHC class II protein complex; regulation of interleukin-4 production; negative regulation of interferon-gamma production; T cell costimulation; immune response; protein tetramerization