CD11b Products

CD11b Antibody Blocking Pepti ...
CD11b Antibody Blocking Peptide
Applications: AC
Recombinant Human CD11b GST ( ...
Recombinant Human CD11b GST (N-Ter...
Species: Hu
Applications: WB, ELISA, MA, PAGE, AP
CD11b Recombinant Protein Ant ...
CD11b Recombinant Protein Antigen
Species: Hu
Applications: AC


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).


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


Entrez Mouse
Uniprot Mouse
Alternate Names
  • antigen CD11b (p170)
  • CD11 antigen-like family member B
  • CD11b antigen
  • CD11b
  • Cell surface glycoprotein MAC-1 subunit alpha
  • Complement component 3 receptor 3 subunit
  • CR-3 alpha chain
  • CR3A
  • CR3AMGC117044
  • integrin alpha-M
  • integrin, alpha M (complement component 3 receptor 3 subunit)
  • Leukocyte adhesion receptor MO1
  • MAC-1
  • MAC1A
  • macrophage antigen alpha polypeptide
  • MO1A
  • neutrophil adherence receptor alpha-M subunit
  • Neutrophil adherence receptor
  • SLEB6