• Product name

    Anti-CD11b antibody [EPR19387]
    See all CD11b primary antibodies
  • Description

    Rabbit monoclonal [EPR19387] to CD11b
  • Host species

  • Tested applications

    Suitable for: WB, ICC/IF, IP, Flow Cytmore details
  • Species reactivity

    Reacts with: Mouse
  • Immunogen

    Synthetic peptide within Mouse CD11b aa 1100 to the C-terminus. The exact sequence is proprietary.
    Database link: P05555

  • Positive control

    • WB: J774A.1, M1 and RAW 264.7 whole cell lysates. ICC/IF: RAW 264.7 cells. Flow Cyt: RAW 264.7 cells. IP: RAW 264.7 whole cell lysate.
  • General notes



    Our RabMAb® technology is a patented hybridoma-based technology for making rabbit monoclonal antibodies. For details on our patents, please refer to RabMab® patents.

    This product is a recombinant rabbit monoclonal antibody.



Our Abpromise guarantee covers the use of ab184308 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
WB 1/1000. Detects a band of approximately 170 kDa (predicted molecular weight: 127 kDa).
ICC/IF 1/500.
IP 1/40.
Flow Cyt 1/70.


  • Function

    Integrin alpha-M/beta-2 is implicated in various adhesive interactions of monocytes, macrophages and granulocytes as well as in mediating the uptake of complement-coated particles. It is identical with CR-3, the receptor for the iC3b fragment of the third complement component. It probably recognizes the R-G-D peptide in C3b. Integrin alpha-M/beta-2 is also a receptor for fibrinogen, factor X and ICAM1. It recognizes P1 and P2 peptides of fibrinogen gamma chain.
  • Tissue specificity

    Predominantly expressed in monocytes and granulocytes.
  • Involvement in disease

    Genetic variations in ITGAM has been associated with susceptibility to systemic lupus erythematosus type 6 (SLEB6) [MIM:609939]. Systemic lupus erythematosus (SLE) is a chronic, inflammatory and often febrile multisystemic disorder of connective tissue. It affects principally the skin, joints, kidneys and serosal membranes. It is thought to represent a failure of the regulatory mechanisms of the autoimmune system.
  • Sequence similarities

    Belongs to the integrin alpha chain family.
    Contains 7 FG-GAP repeats.
    Contains 1 VWFA domain.
  • Domain

    The integrin I-domain (insert) is a VWFA domain. Integrins with I-domains do not undergo protease cleavage.
  • Cellular localization

  • Information by UniProt
  • Database links

  • Alternative names

    • antigen CD11b (p170) antibody
    • Antigen CD11b p170 antibody
    • CD11 antigen like family member B antibody
    • CD11 antigen-like family member B antibody
    • CD11b antibody
    • CD11b/CD18 antibody
    • CD49d antibody
    • Cell surface glycoprotein MAC-1 subunit alpha antibody
    • Complement component 3 receptor 3 subunit antibody
    • Complement Component Receptor 3 Alpha antibody
    • Complement receptor type 3 antibody
    • Complement receptor type 3, alpha subunit antibody
    • CR 3 alpha chain (CR3A) antibody
    • CR 3 alpha chain antibody
    • CR-3 alpha chain antibody
    • CR3 antibody
    • CR3A antibody
    • F730045J24Rik antibody
    • Integrin Alpha M antibody
    • Integrin alpha M chain antibody
    • Integrin alpha-M antibody
    • Integrin beta 2 alpha subunit antibody
    • Integrin subunit alpha M antibody
    • integrin, alpha M (complement component 3 receptor 3 subunit) antibody
    • ITAM_HUMAN antibody
    • ITGAM antibody
    • Leukocyte adhesion receptor MO1 antibody
    • Ly-40 antibody
    • MAC 1 antibody
    • Mac-1a antibody
    • MAC1 antibody
    • Mac1, alpha subunit antibody
    • MAC1A antibody
    • Macrophage antigen alpha polypeptide antibody
    • MGC117044 antibody
    • Mo1 antibody
    • Mo1, alpha subunit antibody
    • MO1A antibody
    • Neutrophil adherence receptor alpha M subunit antibody
    • Neutrophil adherence receptor antibody
    • SLEB6 antibody
    see all


  • Flow cytometric analysis of RAW 264.7 (Mouse macrophage cell line transformed with Abelson murine leukemia virus) cells labeling CD11b with ab184308 at 1/70 dilution (red) compared with a Rabbit IgG, monoclonal [EPR25A] -Isotype control (ab172730) (black) and an unlabelled control (cells without incubation with primary antibody and secondary antibody) (blue). Goat anti Rabbit IgG (Alexa Fluor® 488) at 1/2000 dilution was used as the secondary antibody.

  • All lanes : Anti-CD11b antibody [EPR19387] (ab184308) at 1/1000 dilution

    Lane 1 : J774A.1 (Mouse macrophage reticulum cell sarcoma cell line) whole cell lysate
    Lane 2 : M1 (Mouse myeloblast myeloid leukemia cell line) whole cell lysate
    Lane 3 : WEHI-231 (Mouse B cell lymphoma cell line) whole cell lysate
    Lane 4 : RAW 264.7 (Mouse macrophage cell line transformed with Abelson murine leukemia virus) whole cell lysate

    Lysates/proteins at 20 µg per lane.

    All lanes : Goat Anti-Rabbit IgG H&L (HRP) (ab97051) at 1/100000 dilution

    Predicted band size: 127 kDa
    Observed band size: 170 kDa
    why is the actual band size different from the predicted?

    Exposure time: 3 minutes

    Blocking/Dilution buffer: 5% NFDM/TBST.

    CD11b is a 170 kD glycoprotein also known as αM integrin, Mac-1 α subunit (PMID: 10603370). It is exclusively restricted to cells of the myeloid lineages and monocytes, but not in T or B cell lines, so WEHI-231 cell lysate serves as a negative control (PMID: 2457584).

  • Immunofluorescent analysis of 100% methanol-fixed RAW 264.7 (Mouse macrophage cell line transformed with Abelson murine leukemia virus) and WEHI-231 (Mouse B cell lymphoma cell line) cells labeling CD11b with ab184308 at 1/500 dilution, followed by Goat Anti-Rabbit IgG (Alexa Fluor® 488) (ab150077) secondary antibody at 1/1,000 dilution (green).

    Confocal image showing membrane staining on RAW 264.7 cells and no staining on WEHI-231 cells (negative cell line).

    The nuclear counter stain is DAPI (blue).

    Tubulin is detected with Anti-alpha Tubulin antibody [DM1A] - Loading Control (ab7291) at 1/1,000 dilution and Goat Anti-Mouse IgG H&L (Alexa Fluor® 594) preadsorbed (ab150120) at 1/1,000 dilution (red).

    The negative controls are as follows:
    -ve control 1: ab184308 at 1/500 dilution followed by ab150120  at 1/1,000 dilution.
    -ve control 2: ab7291  at 1/1000 dilution followed by ab150077  at 1/1,000 dilution.

  • CD11b was immunoprecipitated from 0.35 mg of RAW 264.7 (Mouse macrophage cell line transformed with Abelson murine leukemia virus) whole cell lysate with ab184308 at 1/40 dilution. Western blot was performed from the immunoprecipitate using ab184308 at 1/1000 dilution. VeriBlot for IP Detection Reagent (HRP) (ab131366), was used for detection at 1/10000 dilution.

    Lane 1: RAW 264.7 whole cell lysate, 10µg (Input).

    Lane 2: ab184308 IP in RAW 264.7 whole cell lysate.

    Lane 3: Rabbit IgG,monoclonal [EPR25A]- Isotype Control (ab172730) instead of ab184308 in RAW 264.7 whole cell lysate.

    Blocking and dilution buffer and concentration: 5% NFDM/TBST.

    Exposure time: 8 seconds.


This product has been referenced in:

  • Gluschko A  et al. The ß2 Integrin Mac-1 Induces Protective LC3-Associated Phagocytosis of Listeria monocytogenes. Cell Host Microbe 23:324-337.e5 (2018). Read more (PubMed: 29544096) »
See 1 Publication for this product

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