Key Product Details

Species Reactivity

Human

Applications

Flow Cytometry, Immunocytochemistry/ Immunofluorescence, CyTOF-ready

Label

Unconjugated

Antibody Source

Monoclonal Mouse IgG1 kappa Clone # ITGAM/271

Format

Azide and BSA Free
View all CD11b/Integrin alpha M Primary Antibodies »

Product Specifications

Immunogen

Recombinant full-length human CD11b protein (Uniprot: P11215)

Localization

Cell surface

Marker

Microglial Marker

Clonality

Monoclonal

Host

Mouse

Isotype

IgG1 kappa

Theoretical MW

127.2 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.

Description

1.0 mg/ml of antibody purified from Bioreactor Concentrate by Protein A/G. Prepared in 10mM PBS WITHOUT BSA & azide. Also available at 200 ug/ml WITH BSA & azide (NBP2-53402).

Antibody with azide - store at 2 to 8C. Antibody without azide - store at -20 to -80C.

Applications for CD11b Antibody (ITGAM/271) - Azide and BSA Free

Application
Recommended Usage

Flow Cytometry

1-2 ug/million cells

Immunocytochemistry/ Immunofluorescence

0.5 - 1 ug/ml
Application Notes
Optimal dilution for a specific application should be determined.

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Flow Cytometry

Formulation, Preparation, and Storage

Purification

Protein A or G purified

Formulation

10 mM PBS

Format

Azide and BSA Free

Preservative

No Preservative

Concentration

1 mg/ml

Shipping

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

Stability & Storage

Store at -20 to -80C. Avoid freeze-thaw cycles.

Background: CD11b/Integrin alpha M

CD11b (integrin alpha M subunit) is a type I transmembrane glycoprotein. CD11b combines with the Integrin beta 2 subunit (CD18) to form the non-covalent heterodimer Integrin alpha M/beta 2, also known as Mac-1 and complement receptor type 3 (CR3). The CD11b/CD18 (Mac-1) heterodimer has a theoretical molecular weight of 127kDa but is often observed near 170kDa due to post translational modifications. Integrins are transmembrane proteins that mediate interactions between adhesion molecules on adjacent cells and/or the extracellular matrix. Integrins have diverse roles in several biological processes, including cell migration during development, wound healing, cell differentiation, and apoptosis. The particular integrin CD11b is known as a pro-inflammatory molecule given its ability to promote phagocyte cytotoxic functions while enhancing several effector molecules such as FcGR, uPAR, and CD14 (1). In macrophages, CpG-DNA stimulates lysosomal degradation and vacuolar acidification, subsequently promoting CD11b release via TLR9 (2). During an acute infection, high CD11b/Mac-1 expression on antigen-specific CD8 (+) T cells can signify recent activation of the immune system, whereas naive T cells and virus-specific memory CD8 (+) T cells express little or no Mac-1 when exposed to a virus (3). Variations at the ITGAM gene, which encodes for the CD11b chain of the Mac-1 integrin, is one of the main genetic risk factors involved in systemic lupus erythematosus /SLE disorder (4).

References

1. Rosetti, F., & Mayadas, T. N. (2016). The many faces of Mac-1 in autoimmune disease. Immunol Rev, 269(1), 175-193. doi:10.1111/imr.12373

2. Kim, D., Kim, T. H., Wu, G., Park, B. K., Ha, J. H., Kim, Y. S.,... Kwon, H. J. (2016). Extracellular Release of CD11b by TLR9 Stimulation in Macrophages. PLoS One, 11(3), e0150677. doi:10.1371/journal.pone.0150677

3. Christensen, J. E., Andreasen, S. O., Christensen, J. P., & Thomsen, A. R. (2001). CD11b expression as a marker to distinguish between recently activated effector CD8(+) T cells and memory cells. Int Immunol, 13(4), 593-600. doi:10.1093/intimm/13.4.593

4. Nath, S. K., Han, S., Kim-Howard, X., Kelly, J. A., Viswanathan, P., Gilkeson, G. S.,... Harley, J. B. (2008). A nonsynonymous functional variant in integrin-alpha(M) (encoded by ITGAM) is associated with systemic lupus erythematosus. Nat Genet, 40(2), 152-154. doi:10.1038/ng.71

Alternate Names

CD11b, Integrin alpha M, ITGAM

Gene Symbol

ITGAM

Additional CD11b/Integrin alpha M Products

Product Documents for CD11b Antibody (ITGAM/271) - Azide and BSA Free

Certificate of Analysis

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Product Specific Notices for CD11b Antibody (ITGAM/271) - Azide and BSA Free

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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Protocols

Find general support by application which include: protocols, troubleshooting, illustrated assays, videos and webinars.

FAQs for CD11b Antibody (ITGAM/271) - Azide and BSA Free

Showing  1 - 5 of 8 FAQs Showing All

    • Q: Do you know if this CD11b antibody can be used in CD11b positive cell depletion? 
      A: This particular CD11b antibody is not reccomended for depletion studies due to the preservative used; however, our CD11b antibody NBP1-06650 is offered in a preservative free format and has been validated for blocking.

    • Q: I am looking for a Mac-1 (microglia cell marker) antibody to do immunostaining with my mouse brain and I checked, you have a lot of antibodies for this biomarker. I don't know which one is the best to be used for immunohistology on mouse brain tissue. Could you please help with this?
      A: I would recommend NB110-89474. This antibody has been published in 11 scientific articles, including several times in IHC in mouse. As long as CD11b is expressed in your sample, it should work just fine and is backed by our 100% Novus Guarantee.

    • Q: I'm not sure if this will work for me, can I get a free sample of your CD11b antibody to test?
      A: We don't offer free samples but we do offer this CD11b antibody in a trial size of 0.025 ml at a reduced cost, all antibodies are backed by our 100% guarantee to work in all validated species and applications on the product's web page.

    • A: CD11b is typically used as a marker for granulocytes and macrophages. You may need a combination of markers to specifically identify neutrophils

    • Q: Looking for a bone marrow macrophage marker can you recommend a CD11b antibody for ICC?
      A: I would recommend NB110-89474 which is our most popular CD11b antibody and has been validated in ICC and cited in 18 publications.

    • Q: The protocol says to do enzymatic antigen retrieval before incubating with the CD11b antibody, which enzyme is used?
      A: The protocol is referencting the PIER method using Proteinase K as the enzyme.

    • Q: We need a CD11b antibody for IHC-P on mouse tissue conjugated to FITC, do you have one that will work?
      A: We have 3 CD11b antibodies for IHC-P and just one CD11 b antibody we offer conjugated to FITC, NB110-89474F.

    • A: A study used this CD11b antibody to stain granulocytes in mouse uterine tissue in IHC. CD11b is also expressed on other leukocytes such as monocytes, macrophages, and natural killer cells.
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