Key Product Details

Species Reactivity

Human

Applications

CyTOF-ready, ELISA, Flow Cytometry, Immunocytochemistry/ Immunofluorescence, Immunohistochemistry, Radioimmunoassay, Western Blot

Label

Alexa Fluor 532

Antibody Source

Monoclonal Mouse IgG1 Clone # TAL 1B5

Concentration

Please see the vial label for concentration. If unlisted please contact technical services.

View all HLA-DR Antibodies »

Product Specifications

Immunogen

Bristol 8 separated alpha chain preparation

Localization

Type I membrane protein

Specificity

Specific for Human Leukocyte Antigen DR, alpha subunit. May be used for HLA typing.

Clonality

Monoclonal

Host

Mouse

Isotype

IgG1

Scientific Data Images for HLA-DR Antibody (TAL 1B5) [Alexa Fluor® 532]

HLA-DR Antibody (TAL 1B5) [Alexa Fluor® 532]

HLA-DR Antibody (TAL 1B5) [Alexa Fluor® 532] [NB600-989AF532] -

HLA-DR Antibody (TAL 1B5) [Alexa Fluor® 532] [NB600-989AF532] - Vial of Alexa Fluor 532 conjugated antibody. Alexa Fluor 532 is optimally excited at 532 nm by the Yellow-Green laser (561 nm) and has an emission maximum of 554 nm.

Applications for HLA-DR Antibody (TAL 1B5) [Alexa Fluor® 532]

Application
Recommended Usage

CyTOF-ready

Optimal dilutions of this antibody should be experimentally determined.

ELISA

Optimal dilutions of this antibody should be experimentally determined.

Flow Cytometry

Optimal dilutions of this antibody should be experimentally determined.

Immunocytochemistry/ Immunofluorescence

Optimal dilutions of this antibody should be experimentally determined.

Immunohistochemistry

Optimal dilutions of this antibody should be experimentally determined.

Radioimmunoassay

Optimal dilutions of this antibody should be experimentally determined.

Western Blot

Optimal dilutions of this antibody should be experimentally determined.

Formulation, Preparation, and Storage

Purification

Protein A purified

Formulation

50 mM Sodium borate

Preservative

0.05% Sodium Azide

Concentration

Please see the vial label for concentration. If unlisted please contact technical services.

Shipping

The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.

Stability & Storage

Store at 4C in the dark. Do not freeze.

Background: HLA-DR

Human Leukocyte Antigen -DR isotype (HLA-DR) is a major histocompatibility complex (MHC) class II molecule expressed by antigen presenting cells (APCs) that plays a significant role in immune response (1). Class II molecules also include isoforms HLA-DP and -DQ (1,2). These type I membrane glycoproteins on APCs present peptides to helper T cells and T cell receptors on CD4+ cells (1). In humans, the genes encoding class II MHC proteins are located on chromosome 6p21, where HLA-DR is typically the most highly expressed, followed by HLA-DQ and then HLA-DP (3). Structurally, HLA-DR molecules are heterodimers consisting of an alpha chain subunit with an approximate theoretical molecular weight of 34 kDa and one of many approximately 30 kDa beta subunits (1-3). The alpha and beta genes are considered highly polymorphic with duplication resulting in nine DRB (beta subunit of HLA-DR) genes (DRB1-DRB9); though only DRB1, DRB3, DRB4, and DRB5 are considered functional (2,3). On the other hand, the alpha subunit is encoded by a single DRA gene (2,3). Studies focusing on the structural and biochemical properties of peptides that bind to HLA-DR molecules have helped contribute to subunit vaccine design and development (3).

Given the role in adaptive immunity, HLA-DR allele polymorphisms, gene misexpression, and dysfunction has been implicated in many diseases ranging from autoimmune disorders to cancer (2). HLA-DR is also a classical biomarker for disease, including sepsis where reduced expression of HLA-DR molecules on monocytes, as measured by flow cytometry, indicates diagnosis and prognosis (4,5). Immunosuppression observed with sepsis results in decreased surface expression of HLA-DR and concurrent increase in expression of programmed death 1 (PD-1), cytotoxic T-lymphocyte antigen 4 (CTLA-4), and B and T lymphocyte attenuator (BTLA) (4). This altered expression results in poor T cell response and apoptosis, along with reduced interferon-gamma (IFN-gamma) production and increased pro-inflammatory cytokine release (4). Furthermore, the decrease in HLA-DR expression is also correlated with the decrease in CD14lowCD16+ inflammatory monocytes (5). Interestingly, COVID-19 patients also exhibit a reduction in HLA-DR that correlates with disease severity and immunosuppression (5).

References

1. Andersson G. (1998). Evolution of the human HLA-DR region. Frontiers in bioscience : a journal and virtual library. https://doi.org/10.2741/a317

2. Shiina, T., Hosomichi, K., Inoko, H., & Kulski, J. K. (2009). The HLA genomic loci map: expression, interaction, diversity and disease. Journal of human genetics. https://doi.org/10.1038/jhg.2008.5

3. Stern, L. J., & Calvo-Calle, J. M. (2009). HLA-DR: molecular insights and vaccine design. Current pharmaceutical design. https://doi.org/10.2174/138161209789105171

4. Zhuang, Y., Peng, H., Chen, Y., Zhou, S., & Chen, Y. (2017). Dynamic monitoring of monocyte HLA-DR expression for the diagnosis, prognosis, and prediction of sepsis. Frontiers in bioscience (Landmark edition). https://doi.org/10.2741/4547

5. Benlyamani, I., Venet, F., Coudereau, R., Gossez, M., & Monneret, G. (2020). Monocyte HLA-DR Measurement by Flow Cytometry in COVID-19 Patients: An Interim Review. Cytometry. Part A : the journal of the International Society for Analytical Cytology. https://doi.org/10.1002/cyto.a.24249

Long Name

Major Histocompatibility Complex Class II DR

Alternate Names

HLA-DRA, HLADR, MHC Class II DR

Gene Symbol

HLA-DRA

Additional HLA-DR Products

Product Documents for HLA-DR Antibody (TAL 1B5) [Alexa Fluor® 532]

Product Datasheets

Certificate of Analysis

To download a Certificate of Analysis, please enter a lot number in the search box below.

Download SDS

Product Specific Notices for HLA-DR Antibody (TAL 1B5) [Alexa Fluor® 532]

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

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