Summary:
Recombinant human HLA-DRB1 protein
Cat：P04564
| 【Derived From】： E.coli |
| 【Endotoxin】： Not measured |
| 【Amino Acid】： 1-266aa |
| 【Purity】： ≥85% by SDS-PAGE. |
| 【Name】： HLA-DRB1 |
| 【Full Name】： major histocompatibility complex，class II，DR beta 1 |
| 【Uniprot】： P01911 |
| 【Gene ID】： 3123 |
| 【Species Reactivity】： Human |
| 【Mol Mass】： 30kDa |
| 【Application】： Immunology research |
| 【Purification】： NI-NTA affinity purification |
| 【Bioactive】： N0 |
| 【Tag】： With a 6×His tag at the N/C-terminus. |
| 【Concentration】： 1mg/ml by SDS-PAGE. |
Store:
| 【Reconstitution】： Reconstituted protein solution can be diluted with distilled water. Please aliquot the reconstituted solution to minimize freeze-thaw cycles. (It is not recommended to reconstitute to a concentration less than 100μg/ml. Dissolve the lyophilized protein in distilled water.) |
| 【Storage】： Reconstituted protein solution can be stored at 4-7℃ for 1-2 weeks， stored at < -20℃ for 1 year. |
| 【Formulation】： Powder: Lyophilized from a 0.2 μm filtered solution of 2-8M Urea, 20mM Tris-HCl, 150mM NaCl, 1mM DTT, PH7.2-8.0. |
Background:
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 a. 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
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