|Tested species reactivity||Human|
|Host / Isotype||Mouse / IgG2a|
|Immunogen||Human HLA Class II (DP, DQ, DR).|
|Contains||0.09% sodium azide|
|Storage Conditions||4°C or -20°C if preferred|
|Tested Applications||Dilution *|
|Flow Cytometry (Flow)||1/50-1/200|
|Functional Assay (FN)||Assay Dependent|
|Immunohistochemistry (Paraffin) (IHC (P))||Assay Dependent|
* Suggested working dilutions are given as a guide only. It is recommended that the user titrate the product for use in their own experiment using appropriate negative and positive controls.
Heat-mediated antigen retrieval using a sodium citrate buffer (pH 6.0) is recommended for the staining of paraffin sections. A suggested positive control for immunohistochemical applications is tonsil. Removal of sodium azide by dialysis is recommended prior to use in functional assays. For FACS analysis, use 10ul of the suggested working dilution to label 1x10^6 cells in 100ul.
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.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.