Invitrogen™ CD8b Monoclonal Antibody (SIDI8BEE), eFluor™ 660, eBioscience™, Invitrogen™

Catalog No.	Quantity
50-246-039	100 Tests
50-246-038	25 Tests

Catalog No. 50-246-039 Supplier Invitrogen™ Supplier No. 50527342

Description

Mouse Monoclonal Antibody

Description: The SIDI8BEE monoclonal antibody reacts with human and rhesus macaque CD8 beta. The CD8b chain associates with the CD8a chain to form the CD8ab heterodimer expressed on the surface of a majority of thymocytes, and on peripheral cytotoxic alpha beta TCR T cells. The CD8 receptor complex binds to MHC class I and plays a role in T cell development and activation of mature T cells. Long been thought to exist either as a heterodimer of the alpha and beta chain or as a homodimer of alpha chains, beta chains have now been shown to homodimerize as well. SIDI8BEE can detect the CD8 beta chain in both the CD8ab heterodimer and the CD8bb homodimer. SIDI8BEE is cross-reactive to human and rhesus macaque CD8b. Other non-human primate species have not been tested. Applications Reported: This SIDI8BEE antibody has been reported for use in flow cytometric analysis. Applications Tested: This SIDI8BEE antibody has been pre-titrated and tested by flow cytometric analysis of human peripheral blood lymphocytes. This can be used at 5 μL (0.125 μg) per test. A test is defined as the amount (μg) of antibody that will stain a cell sample in a final volume of 100 μL. Cell number should be determined empirically but can range from 10^5 to 10^8 cells/test. eFluor™ 660 is a replacement for Alexa Fluor™ 647. eFluor™ 660 emits at 659 nm and is excited with the red laser (633 nm).

The CD8B antigen is a cell surface glycoprotein found on most cytotoxic T lymphocytes that mediates efficient cell-cell interactions within the immune system. The CD8 antigen, acting as a coreceptor, and the T-cell receptor on the T lymphocyte recognize antigens displayed by an antigen presenting cell (APC) in the context of class I MHC molecules. The functional coreceptor is either a homodimer composed of two alpha chains, or a heterodimer composed of one alpha and one beta chain. Both alpha and beta chains share significant homology to immunoglobulin variable light chains. This gene encodes the CD8 beta chain isoforms. Multiple alternatively spliced transcript variants encoding distinct membrane associated or secreted isoforms have been described. A pseudogene, also located on chromosome 2, has been identified.

Specifications

• Antigen: CD8b
• Applications: Flow Cytometry
• Classification: Monoclonal
• Clone: SIDI8BEE
• Concentration: 5 μL/Test
• Conjugate: eFluor 660
• Formulation: PBS with BSA and 0.09% sodium azide; pH 7.2
• Gene: Cd8b
• Gene Accession No.: P10966
• Gene Alias: CD8; CD8 antigen 37 kDa chain; CD8 antigen beta polypeptide; CD8 antigen beta polypeptide precursor; CD8 antigen beta-chain; CD8 antigen, beta chain; CD8 antigen, beta chain 1; CD8 antigen, beta polypeptide 1 (p37); CD8 antigen, beta-chain; CD8 beta; CD8 beta chain; CD8a; CD8alpha; CD8B; CD8b antigen; CD8b molecule; CD8b molecule pseudogene; CD8B1; CD8beta; CD8BP; LEU2; Leu-2; LY3; Ly-3; Ly-C; Lymphocyte antigen 3; Lyt3; Lyt-3; MAL; OX-8 membrane antigen; p32; P37; T lymphocyte surface glycoprotein beta chain; T-cell membrane glycoprotein Ly-3; T-cell surface glycoprotein; T-cell surface glycoprotein CD8 beta chain; T-cell surface glycoprotein Lyt-3
• Gene Symbols: Cd8b
• Host Species: Mouse
• Purification Method: Affinity chromatography
• Quantity: 100 Tests
• Regulatory Status: RUO
• Primary or Secondary: Primary
• Gene ID (Entrez): 926
• Target Species: Human, Monkey
• Content And Storage: 4°C, store in dark, DO NOT FREEZE!
• Product Type: Antibody
• Form: Liquid
• Isotype: IgG1 κ

Frequently Asked Questions (FAQs)

I am unable to analyze my cells stained with eFluor Organic Dyes today. What options do I have?

Our options will depend on the samples you are analyzing.

If cell viability is not critical, you can store your stained samples at 4 degrees C or on ice overnight in the dark and analyze the following day.

For samples stained with eFluor organic fluorochromes, we recommend that cells be suspended in 100 uL of Flow Cytometry Staining Buffer (Cat. No. 00-4222) and 100 uL of eBioscience IC Fixation Buffer (Cat. No. 00-8222); samples can be incubated for up to 3 days at 4 degrees C in the dark. Alternatively, the 1-step Fix/Lyse Solution (Cat. No. 00-5333) can be used. This is a great option when working with whole blood but also works for other cell types.

Can the eFluor Organic fluorochromes be used for intracellular staining?

Yes, the eFluor Organic fluorochromes can be used for intracellular staining. The eFluor organic fluorochromes maintain bright signal and require minimal changes in compensation when fixed with eBioscience IC Fixation Buffer (Cat. No. 00-8222-49) and Permeabilization Buffer (Cat. No. 00-8333-56) or 1-step Fix/Lyse Solution (Cat. No. 00-5333-54, 00-5333-57) (as compared to live cells).

Is the eFluor 660 fluorochrome compatible with Anti-Cy5/Alexa Fluor 647 beads?

Yes, in-house studies have demonstrated that the eFluor 660 fluorochrome is recognized by Anti-Cy5/Alexa Fluor 647 beads. Side by side studies with Alexa Fluor 647 versus eFluor 660 conjugated antibodies have demonstrated comparable results.

What buffers are compatible with the eFluor Organic fluorochromes and eVolve QDots?

The eFluor Organic fluorochromes and eVolve QDots can be used with flow staining buffers containing PBS and protein.

What is the difference between eFluor Organic Dyes and eVolve Qdots?

The eFluor Organic Dyes (eFluor 450, APC-eFluor 780, PerCP-eFluor 710, eFluor 710) are conventional fluorochromes. In contrast, the eVolve line of products are Quantum dots.

Are the eFluor Organic Dyes photo-labile?

As with other fluorochromes, we recommend minimal exposure to light to maintain optimal signal.

Safety and Handling

WARNING: Cancer - www.P65Warnings.ca.gov

For Research Use Only.